题目
给我初一一元一次解方程及答案,100道左右.
初一一元一次解方程练习题,不要应用题,100道左右
初一一元一次解方程练习题,不要应用题,100道左右
提问时间:2021-01-05
答案
题:10 x + 90 = 290
10 x = 290-90
x= 200/10
x= 20
题:10 x + 91 = 291
10 x = 291-91
x= 200/10
x= 20
题:10 x + 92 = 292
10 x = 292-92
x= 200/10
x= 20
题:10 x + 93 = 293
10 x = 293-93
x= 200/10
x= 20
题:10 x + 94 = 294
10 x = 294-94
x= 200/10
x= 20
题:10 x + 95 = 295
10 x = 295-95
x= 200/10
x= 20
题:10 x + 96 = 296
10 x = 296-96
x= 200/10
x= 20
题:10 x + 97 = 297
10 x = 297-97
x= 200/10
x= 20
题:10 x + 98 = 298
10 x = 298-98
x= 200/10
x= 20
题:10 x + 99 = 299
10 x = 299-99
x= 200/10
x= 20
题:10 x + 90 = 300
10 x = 300-90
x= 210/10
x= 21
题:10 x + 91 = 301
10 x = 301-91
x= 210/10
x= 21
题:10 x + 92 = 302
10 x = 302-92
x= 210/10
x= 21
题:10 x + 93 = 303
10 x = 303-93
x= 210/10
x= 21
题:10 x + 94 = 304
10 x = 304-94
x= 210/10
x= 21
题:10 x + 95 = 305
10 x = 305-95
x= 210/10
x= 21
题:10 x + 96 = 306
10 x = 306-96
x= 210/10
x= 21
题:10 x + 97 = 307
10 x = 307-97
x= 210/10
x= 21
题:10 x + 98 = 308
10 x = 308-98
x= 210/10
x= 21
题:10 x + 99 = 309
10 x = 309-99
x= 210/10
x= 21
题:10 x + 90 = 310
10 x = 310-90
x= 220/10
x= 22
题:10 x + 91 = 311
10 x = 311-91
x= 220/10
x= 22
题:10 x + 92 = 312
10 x = 312-92
x= 220/10
x= 22
题:10 x + 93 = 313
10 x = 313-93
x= 220/10
x= 22
题:10 x + 94 = 314
10 x = 314-94
x= 220/10
x= 22
题:10 x + 95 = 315
10 x = 315-95
x= 220/10
x= 22
题:10 x + 96 = 316
10 x = 316-96
x= 220/10
x= 22
题:10 x + 97 = 317
10 x = 317-97
x= 220/10
x= 22
题:10 x + 98 = 318
10 x = 318-98
x= 220/10
x= 22
题:10 x + 99 = 319
10 x = 319-99
x= 220/10
x= 22
题:10 x + 90 = 320
10 x = 320-90
x= 230/10
x= 23
题:10 x + 91 = 321
10 x = 321-91
x= 230/10
x= 23
题:10 x + 92 = 322
10 x = 322-92
x= 230/10
x= 23
题:10 x + 93 = 323
10 x = 323-93
x= 230/10
x= 23
题:10 x + 94 = 324
10 x = 324-94
x= 230/10
x= 23
题:10 x + 95 = 325
10 x = 325-95
x= 230/10
x= 23
题:10 x + 96 = 326
10 x = 326-96
x= 230/10
x= 23
题:10 x + 97 = 327
10 x = 327-97
x= 230/10
x= 23
题:10 x + 98 = 328
10 x = 328-98
x= 230/10
x= 23
题:10 x + 99 = 329
10 x = 329-99
x= 230/10
x= 23
题:10 x + 90 = 330
10 x = 330-90
x= 240/10
x= 24
题:10 x + 91 = 331
10 x = 331-91
x= 240/10
x= 24
题:10 x + 92 = 332
10 x = 332-92
x= 240/10
x= 24
题:10 x + 93 = 333
10 x = 333-93
x= 240/10
x= 24
题:10 x + 94 = 334
10 x = 334-94
x= 240/10
x= 24
题:10 x + 95 = 335
10 x = 335-95
x= 240/10
x= 24
题:10 x + 96 = 336
10 x = 336-96
x= 240/10
x= 24
题:10 x + 97 = 337
10 x = 337-97
x= 240/10
x= 24
题:10 x + 98 = 338
10 x = 338-98
x= 240/10
x= 24
题:10 x + 99 = 339
10 x = 339-99
x= 240/10
x= 24
题:10 x + 90 = 340
10 x = 340-90
x= 250/10
x= 25
题:10 x + 91 = 341
10 x = 341-91
x= 250/10
x= 25
题:10 x + 92 = 342
10 x = 342-92
x= 250/10
x= 25
题:10 x + 93 = 343
10 x = 343-93
x= 250/10
x= 25
题:10 x + 94 = 344
10 x = 344-94
x= 250/10
x= 25
题:10 x + 95 = 345
10 x = 345-95
x= 250/10
x= 25
题:10 x + 96 = 346
10 x = 346-96
x= 250/10
x= 25
题:10 x + 97 = 347
10 x = 347-97
x= 250/10
x= 25
题:10 x + 98 = 348
10 x = 348-98
x= 250/10
x= 25
题:10 x + 99 = 349
10 x = 349-99
x= 250/10
x= 25
题:10 x + 90 = 350
10 x = 350-90
x= 260/10
x= 26
题:10 x + 91 = 351
10 x = 351-91
x= 260/10
x= 26
题:10 x + 92 = 352
10 x = 352-92
x= 260/10
x= 26
题:10 x + 93 = 353
10 x = 353-93
x= 260/10
x= 26
题:10 x + 94 = 354
10 x = 354-94
x= 260/10
x= 26
题:10 x + 95 = 355
10 x = 355-95
x= 260/10
x= 26
题:10 x + 96 = 356
10 x = 356-96
x= 260/10
x= 26
题:10 x + 97 = 357
10 x = 357-97
x= 260/10
x= 26
题:10 x + 98 = 358
10 x = 358-98
x= 260/10
x= 26
题:10 x + 99 = 359
10 x = 359-99
x= 260/10
x= 26
题:10 x + 90 = 360
10 x = 360-90
x= 270/10
x= 27
题:10 x + 91 = 361
10 x = 361-91
x= 270/10
x= 27
题:10 x + 92 = 362
10 x = 362-92
x= 270/10
x= 27
题:10 x + 93 = 363
10 x = 363-93
x= 270/10
x= 27
题:10 x + 94 = 364
10 x = 364-94
x= 270/10
x= 27
题:10 x + 95 = 365
10 x = 365-95
x= 270/10
x= 27
题:10 x + 96 = 366
10 x = 366-96
x= 270/10
x= 27
题:10 x + 97 = 367
10 x = 367-97
x= 270/10
x= 27
题:10 x + 98 = 368
10 x = 368-98
x= 270/10
x= 27
题:10 x + 99 = 369
10 x = 369-99
x= 270/10
x= 27
题:10 x + 90 = 370
10 x = 370-90
x= 280/10
x= 28
题:10 x + 91 = 371
10 x = 371-91
x= 280/10
x= 28
题:10 x + 92 = 372
10 x = 372-92
x= 280/10
x= 28
题:10 x + 93 = 373
10 x = 373-93
x= 280/10
x= 28
题:10 x + 94 = 374
10 x = 374-94
x= 280/10
x= 28
题:10 x + 95 = 375
10 x = 375-95
x= 280/10
x= 28
题:10 x + 96 = 376
10 x = 376-96
x= 280/10
x= 28
题:10 x + 97 = 377
10 x = 377-97
x= 280/10
x= 28
题:10 x + 98 = 378
10 x = 378-98
x= 280/10
x= 28
题:10 x + 99 = 379
10 x = 379-99
x= 280/10
x= 28
题:10 x + 90 = 380
10 x = 380-90
x= 290/10
x= 29
题:10 x + 91 = 381
10 x = 381-91
x= 290/10
x= 29
题:10 x + 92 = 382
10 x = 382-92
x= 290/10
x= 29
题:10 x + 93 = 383
10 x = 383-93
x= 290/10
x= 29
题:10 x + 94 = 384
10 x = 384-94
x= 290/10
x= 29
题:10 x + 95 = 385
10 x = 385-95
x= 290/10
x= 29
题:10 x + 96 = 386
10 x = 386-96
x= 290/10
x= 29
题:10 x + 97 = 387
10 x = 387-97
x= 290/10
x= 29
题:10 x + 98 = 388
10 x = 388-98
x= 290/10
x= 29
题:10 x + 99 = 389
10 x = 389-99
x= 290/10
x= 29
题:11 x + 90 = 310
11 x = 310-90
x= 220/11
x= 20
题:11 x + 91 = 311
11 x = 311-91
x= 220/11
x= 20
题:11 x + 92 = 312
11 x = 312-92
x= 220/11
x= 20
题:11 x + 93 = 313
11 x = 313-93
x= 220/11
x= 20
题:11 x + 94 = 314
11 x = 314-94
x= 220/11
x= 20
题:11 x + 95 = 315
11 x = 315-95
x= 220/11
x= 20
题:11 x + 96 = 316
11 x = 316-96
x= 220/11
x= 20
题:11 x + 97 = 317
11 x = 317-97
x= 220/11
x= 20
题:11 x + 98 = 318
11 x = 318-98
x= 220/11
x= 20
题:11 x + 99 = 319
11 x = 319-99
x= 220/11
x= 20
题:11 x + 90 = 321
11 x = 321-90
x= 231/11
x= 21
题:11 x + 91 = 322
11 x = 322-91
x= 231/11
x= 21
题:11 x + 92 = 323
11 x = 323-92
x= 231/11
x= 21
题:11 x + 93 = 324
11 x = 324-93
x= 231/11
x= 21
题:11 x + 94 = 325
11 x = 325-94
x= 231/11
x= 21
题:11 x + 95 = 326
11 x = 326-95
x= 231/11
x= 21
题:11 x + 96 = 327
11 x = 327-96
x= 231/11
x= 21
题:11 x + 97 = 328
11 x = 328-97
x= 231/11
x= 21
题:11 x + 98 = 329
11 x = 329-98
x= 231/11
x= 21
题:11 x + 99 = 330
11 x = 330-99
x= 231/11
x= 21
题:11 x + 90 = 332
11 x = 332-90
x= 242/11
x= 22
题:11 x + 91 = 333
11 x = 333-91
x= 242/11
x= 22
题:11 x + 92 = 334
11 x = 334-92
x= 242/11
x= 22
题:11 x + 93 = 335
11 x = 335-93
x= 242/11
x= 22
题:11 x + 94 = 336
11 x = 336-94
x= 242/11
x= 22
题:11 x + 95 = 337
11 x = 337-95
x= 242/11
x= 22
题:11 x + 96 = 338
11 x = 338-96
x= 242/11
x= 22
题:12 x + 99 = 375
12 x = 375-99
x= 276/12
x= 23
题:13 x + 90 = 454
13 x = 454-90
x= 364/13
x= 28
题:13 x + 91 = 455
13 x = 455-91
x= 364/13
x= 28
题:13 x + 92 = 456
13 x = 456-92
x= 364/13
x= 28
题:16 x + 99 = 467
16 x = 467-99
x= 368/16
x= 23
题:16 x + 90 = 474
16 x = 474-90
x= 384/16
x= 24
题:16 x + 91 = 475
16 x = 475-91
x= 384/16
x= 24
题:16 x + 92 = 476
16 x = 476-92
x= 384/16
x= 24
题:18 x + 93 = 471
18 x = 471-93
x= 378/18
x= 21
题:18 x + 94 = 472
18 x = 472-94
x= 378/18
x= 21
题:18 x + 95 = 473
18 x = 473-95
x= 378/18
x= 21
题:18 x + 99 = 585
18 x = 585-99
x= 486/18
x= 27
题:18 x + 90 = 594
18 x = 594-90
x= 504/18
x= 28
题:19 x + 95 = 532
19 x = 532-95
x= 437/19
x= 23
题:19 x + 96 = 533
19 x = 533-96
x= 437/19
x= 23
题:19 x + 92 = 643
19 x = 643-92
x= 551/19
x= 29
题:19 x + 93 = 644
19 x = 644-93
x= 551/19
x= 29
题:19 x + 94 = 645
19 x = 645-94
x= 551/19
x= 29
题:19 x + 95 = 646
19 x = 646-95
x= 551/19
x= 29
题:19 x + 96 = 647
19 x = 647-96
x= 551/19
x= 29
题:19 x + 97 = 648
19 x = 648-97
x= 551/19
x= 29
题:19 x + 98 = 649
19 x = 649-98
x= 551/19
x= 29
题:19 x + 99 = 650
19 x = 650-99
x= 551/19
x= 29
10 x = 290-90
x= 200/10
x= 20
题:10 x + 91 = 291
10 x = 291-91
x= 200/10
x= 20
题:10 x + 92 = 292
10 x = 292-92
x= 200/10
x= 20
题:10 x + 93 = 293
10 x = 293-93
x= 200/10
x= 20
题:10 x + 94 = 294
10 x = 294-94
x= 200/10
x= 20
题:10 x + 95 = 295
10 x = 295-95
x= 200/10
x= 20
题:10 x + 96 = 296
10 x = 296-96
x= 200/10
x= 20
题:10 x + 97 = 297
10 x = 297-97
x= 200/10
x= 20
题:10 x + 98 = 298
10 x = 298-98
x= 200/10
x= 20
题:10 x + 99 = 299
10 x = 299-99
x= 200/10
x= 20
题:10 x + 90 = 300
10 x = 300-90
x= 210/10
x= 21
题:10 x + 91 = 301
10 x = 301-91
x= 210/10
x= 21
题:10 x + 92 = 302
10 x = 302-92
x= 210/10
x= 21
题:10 x + 93 = 303
10 x = 303-93
x= 210/10
x= 21
题:10 x + 94 = 304
10 x = 304-94
x= 210/10
x= 21
题:10 x + 95 = 305
10 x = 305-95
x= 210/10
x= 21
题:10 x + 96 = 306
10 x = 306-96
x= 210/10
x= 21
题:10 x + 97 = 307
10 x = 307-97
x= 210/10
x= 21
题:10 x + 98 = 308
10 x = 308-98
x= 210/10
x= 21
题:10 x + 99 = 309
10 x = 309-99
x= 210/10
x= 21
题:10 x + 90 = 310
10 x = 310-90
x= 220/10
x= 22
题:10 x + 91 = 311
10 x = 311-91
x= 220/10
x= 22
题:10 x + 92 = 312
10 x = 312-92
x= 220/10
x= 22
题:10 x + 93 = 313
10 x = 313-93
x= 220/10
x= 22
题:10 x + 94 = 314
10 x = 314-94
x= 220/10
x= 22
题:10 x + 95 = 315
10 x = 315-95
x= 220/10
x= 22
题:10 x + 96 = 316
10 x = 316-96
x= 220/10
x= 22
题:10 x + 97 = 317
10 x = 317-97
x= 220/10
x= 22
题:10 x + 98 = 318
10 x = 318-98
x= 220/10
x= 22
题:10 x + 99 = 319
10 x = 319-99
x= 220/10
x= 22
题:10 x + 90 = 320
10 x = 320-90
x= 230/10
x= 23
题:10 x + 91 = 321
10 x = 321-91
x= 230/10
x= 23
题:10 x + 92 = 322
10 x = 322-92
x= 230/10
x= 23
题:10 x + 93 = 323
10 x = 323-93
x= 230/10
x= 23
题:10 x + 94 = 324
10 x = 324-94
x= 230/10
x= 23
题:10 x + 95 = 325
10 x = 325-95
x= 230/10
x= 23
题:10 x + 96 = 326
10 x = 326-96
x= 230/10
x= 23
题:10 x + 97 = 327
10 x = 327-97
x= 230/10
x= 23
题:10 x + 98 = 328
10 x = 328-98
x= 230/10
x= 23
题:10 x + 99 = 329
10 x = 329-99
x= 230/10
x= 23
题:10 x + 90 = 330
10 x = 330-90
x= 240/10
x= 24
题:10 x + 91 = 331
10 x = 331-91
x= 240/10
x= 24
题:10 x + 92 = 332
10 x = 332-92
x= 240/10
x= 24
题:10 x + 93 = 333
10 x = 333-93
x= 240/10
x= 24
题:10 x + 94 = 334
10 x = 334-94
x= 240/10
x= 24
题:10 x + 95 = 335
10 x = 335-95
x= 240/10
x= 24
题:10 x + 96 = 336
10 x = 336-96
x= 240/10
x= 24
题:10 x + 97 = 337
10 x = 337-97
x= 240/10
x= 24
题:10 x + 98 = 338
10 x = 338-98
x= 240/10
x= 24
题:10 x + 99 = 339
10 x = 339-99
x= 240/10
x= 24
题:10 x + 90 = 340
10 x = 340-90
x= 250/10
x= 25
题:10 x + 91 = 341
10 x = 341-91
x= 250/10
x= 25
题:10 x + 92 = 342
10 x = 342-92
x= 250/10
x= 25
题:10 x + 93 = 343
10 x = 343-93
x= 250/10
x= 25
题:10 x + 94 = 344
10 x = 344-94
x= 250/10
x= 25
题:10 x + 95 = 345
10 x = 345-95
x= 250/10
x= 25
题:10 x + 96 = 346
10 x = 346-96
x= 250/10
x= 25
题:10 x + 97 = 347
10 x = 347-97
x= 250/10
x= 25
题:10 x + 98 = 348
10 x = 348-98
x= 250/10
x= 25
题:10 x + 99 = 349
10 x = 349-99
x= 250/10
x= 25
题:10 x + 90 = 350
10 x = 350-90
x= 260/10
x= 26
题:10 x + 91 = 351
10 x = 351-91
x= 260/10
x= 26
题:10 x + 92 = 352
10 x = 352-92
x= 260/10
x= 26
题:10 x + 93 = 353
10 x = 353-93
x= 260/10
x= 26
题:10 x + 94 = 354
10 x = 354-94
x= 260/10
x= 26
题:10 x + 95 = 355
10 x = 355-95
x= 260/10
x= 26
题:10 x + 96 = 356
10 x = 356-96
x= 260/10
x= 26
题:10 x + 97 = 357
10 x = 357-97
x= 260/10
x= 26
题:10 x + 98 = 358
10 x = 358-98
x= 260/10
x= 26
题:10 x + 99 = 359
10 x = 359-99
x= 260/10
x= 26
题:10 x + 90 = 360
10 x = 360-90
x= 270/10
x= 27
题:10 x + 91 = 361
10 x = 361-91
x= 270/10
x= 27
题:10 x + 92 = 362
10 x = 362-92
x= 270/10
x= 27
题:10 x + 93 = 363
10 x = 363-93
x= 270/10
x= 27
题:10 x + 94 = 364
10 x = 364-94
x= 270/10
x= 27
题:10 x + 95 = 365
10 x = 365-95
x= 270/10
x= 27
题:10 x + 96 = 366
10 x = 366-96
x= 270/10
x= 27
题:10 x + 97 = 367
10 x = 367-97
x= 270/10
x= 27
题:10 x + 98 = 368
10 x = 368-98
x= 270/10
x= 27
题:10 x + 99 = 369
10 x = 369-99
x= 270/10
x= 27
题:10 x + 90 = 370
10 x = 370-90
x= 280/10
x= 28
题:10 x + 91 = 371
10 x = 371-91
x= 280/10
x= 28
题:10 x + 92 = 372
10 x = 372-92
x= 280/10
x= 28
题:10 x + 93 = 373
10 x = 373-93
x= 280/10
x= 28
题:10 x + 94 = 374
10 x = 374-94
x= 280/10
x= 28
题:10 x + 95 = 375
10 x = 375-95
x= 280/10
x= 28
题:10 x + 96 = 376
10 x = 376-96
x= 280/10
x= 28
题:10 x + 97 = 377
10 x = 377-97
x= 280/10
x= 28
题:10 x + 98 = 378
10 x = 378-98
x= 280/10
x= 28
题:10 x + 99 = 379
10 x = 379-99
x= 280/10
x= 28
题:10 x + 90 = 380
10 x = 380-90
x= 290/10
x= 29
题:10 x + 91 = 381
10 x = 381-91
x= 290/10
x= 29
题:10 x + 92 = 382
10 x = 382-92
x= 290/10
x= 29
题:10 x + 93 = 383
10 x = 383-93
x= 290/10
x= 29
题:10 x + 94 = 384
10 x = 384-94
x= 290/10
x= 29
题:10 x + 95 = 385
10 x = 385-95
x= 290/10
x= 29
题:10 x + 96 = 386
10 x = 386-96
x= 290/10
x= 29
题:10 x + 97 = 387
10 x = 387-97
x= 290/10
x= 29
题:10 x + 98 = 388
10 x = 388-98
x= 290/10
x= 29
题:10 x + 99 = 389
10 x = 389-99
x= 290/10
x= 29
题:11 x + 90 = 310
11 x = 310-90
x= 220/11
x= 20
题:11 x + 91 = 311
11 x = 311-91
x= 220/11
x= 20
题:11 x + 92 = 312
11 x = 312-92
x= 220/11
x= 20
题:11 x + 93 = 313
11 x = 313-93
x= 220/11
x= 20
题:11 x + 94 = 314
11 x = 314-94
x= 220/11
x= 20
题:11 x + 95 = 315
11 x = 315-95
x= 220/11
x= 20
题:11 x + 96 = 316
11 x = 316-96
x= 220/11
x= 20
题:11 x + 97 = 317
11 x = 317-97
x= 220/11
x= 20
题:11 x + 98 = 318
11 x = 318-98
x= 220/11
x= 20
题:11 x + 99 = 319
11 x = 319-99
x= 220/11
x= 20
题:11 x + 90 = 321
11 x = 321-90
x= 231/11
x= 21
题:11 x + 91 = 322
11 x = 322-91
x= 231/11
x= 21
题:11 x + 92 = 323
11 x = 323-92
x= 231/11
x= 21
题:11 x + 93 = 324
11 x = 324-93
x= 231/11
x= 21
题:11 x + 94 = 325
11 x = 325-94
x= 231/11
x= 21
题:11 x + 95 = 326
11 x = 326-95
x= 231/11
x= 21
题:11 x + 96 = 327
11 x = 327-96
x= 231/11
x= 21
题:11 x + 97 = 328
11 x = 328-97
x= 231/11
x= 21
题:11 x + 98 = 329
11 x = 329-98
x= 231/11
x= 21
题:11 x + 99 = 330
11 x = 330-99
x= 231/11
x= 21
题:11 x + 90 = 332
11 x = 332-90
x= 242/11
x= 22
题:11 x + 91 = 333
11 x = 333-91
x= 242/11
x= 22
题:11 x + 92 = 334
11 x = 334-92
x= 242/11
x= 22
题:11 x + 93 = 335
11 x = 335-93
x= 242/11
x= 22
题:11 x + 94 = 336
11 x = 336-94
x= 242/11
x= 22
题:11 x + 95 = 337
11 x = 337-95
x= 242/11
x= 22
题:11 x + 96 = 338
11 x = 338-96
x= 242/11
x= 22
题:12 x + 99 = 375
12 x = 375-99
x= 276/12
x= 23
题:13 x + 90 = 454
13 x = 454-90
x= 364/13
x= 28
题:13 x + 91 = 455
13 x = 455-91
x= 364/13
x= 28
题:13 x + 92 = 456
13 x = 456-92
x= 364/13
x= 28
题:16 x + 99 = 467
16 x = 467-99
x= 368/16
x= 23
题:16 x + 90 = 474
16 x = 474-90
x= 384/16
x= 24
题:16 x + 91 = 475
16 x = 475-91
x= 384/16
x= 24
题:16 x + 92 = 476
16 x = 476-92
x= 384/16
x= 24
题:18 x + 93 = 471
18 x = 471-93
x= 378/18
x= 21
题:18 x + 94 = 472
18 x = 472-94
x= 378/18
x= 21
题:18 x + 95 = 473
18 x = 473-95
x= 378/18
x= 21
题:18 x + 99 = 585
18 x = 585-99
x= 486/18
x= 27
题:18 x + 90 = 594
18 x = 594-90
x= 504/18
x= 28
题:19 x + 95 = 532
19 x = 532-95
x= 437/19
x= 23
题:19 x + 96 = 533
19 x = 533-96
x= 437/19
x= 23
题:19 x + 92 = 643
19 x = 643-92
x= 551/19
x= 29
题:19 x + 93 = 644
19 x = 644-93
x= 551/19
x= 29
题:19 x + 94 = 645
19 x = 645-94
x= 551/19
x= 29
题:19 x + 95 = 646
19 x = 646-95
x= 551/19
x= 29
题:19 x + 96 = 647
19 x = 647-96
x= 551/19
x= 29
题:19 x + 97 = 648
19 x = 648-97
x= 551/19
x= 29
题:19 x + 98 = 649
19 x = 649-98
x= 551/19
x= 29
题:19 x + 99 = 650
19 x = 650-99
x= 551/19
x= 29
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