| X | − | 5000 | − | ( | ( | X | − | 5000 | ) | × | 3 100 | ) | = | 10000 |
| 方程左边 = | X | − | 5000 | − | ( | X | − | 5000 | ) | × | 3 100 |
| = | X | − | 5000 | − | X | × | 3 100 | + | 5000 | × | 3 100 |
| = | X | − | 5000 | − | X | × | 3 100 | + | 150 |
| = | 97 100 | X | − | 4850 |
97 100 | X | − | 4850 | = | 10000 |
97 100 | X | = | 10000 | + | 4850 |
97 100 | X | = | 14850 |
| X | = | 14850 | ÷ | 97 100 |
| = | 14850 | × | 100 97 |
| X | = | 1485000 97 |
| X | = | 15309.278351 |