| - | 240000 | = | X | − | ( | 21 50 | X | + | 404175 | ) |
| 方程右边 = | X | − | 21 50 | X | − | 404175 |
| = | 29 50 | X | − | 404175 |
| - | 240000 | = | 29 50 | X | − | 404175 |
| - | 29 50 | X | = | - | 404175 | + | 240000 |
| - | 29 50 | X | = | - | 164175 |
| 164175 | = | 29 50 | X |
29 50 | X | = | 164175 |
| X | = | 164175 | ÷ | 29 50 |
| = | 164175 | × | 50 29 |
| X | = | 8208750 29 |
| X | = | 283060.344828 |