13 5 | ( | 200 | − | x | ) | + | 1 | x | = | 53 50 | × | 200 |
| 方程左边 = | 13 5 | × | 200 | − | 13 5 | x | + | 1 | x |
| = | 520 | − | 13 5 | x | + | 1 | x |
| = | 520 | − | 8 5 | x |
| 520 | − | 8 5 | x | = | 53 50 | × | 200 |
| 方程右边 = | 212 |
| 520 | − | 8 5 | x | = | 212 |
| - | 8 5 | x | = | 212 | − | 520 |
| - | 8 5 | x | = | - | 308 |
| 308 | = | 8 5 | x |
8 5 | x | = | 308 |
| x | = | 308 | ÷ | 8 5 |
| = | 308 | × | 5 8 |
| = | 77 | × | 5 2 |
| x | = | 385 2 |
| x | = | 192.5 |