57 100 | x | + | 230 | × | 29 100 | + | 17 50 | ( | 330 | − | x | − | 230 | ) | = | 1287 10 |
| 方程左边 = | 57 100 | x | + | 667 10 | + | 17 50 | ( | 330 | − | x | − | 230 | ) |
57 100 | x | + | 667 10 | + | 17 50 | ( | 330 | − | x | − | 230 | ) | = | 1287 10 |
| 方程左边 = | 57 100 | x | + | 667 10 | + | 17 50 | × | 330 | − | 17 50 | x | − | 17 50 | × | 230 |
| = | 57 100 | x | + | 667 10 | + | 561 5 | − | 17 50 | x | − | 391 5 |
| = | 23 100 | x | + | 1007 10 |
23 100 | x | + | 1007 10 | = | 1287 10 |
23 100 | x | = | 1287 10 | − | 1007 10 |
23 100 | x | = | 28 |
| x | = | 28 | ÷ | 23 100 |
| = | 28 | × | 100 23 |
| x | = | 2800 23 |
| x | = | 121.73913 |