| X | − | ( | X | − | 50000 | ) | × | 3 50 | = | 8816739 100 |
| 方程左边 = | X | − | X | × | 3 50 | + | 50000 | × | 3 50 |
| = | X | − | X | × | 3 50 | + | 3000 |
| = | 47 50 | X | + | 3000 |
47 50 | X | + | 3000 | = | 8816739 100 |
47 50 | X | = | 8816739 100 | − | 3000 |
47 50 | X | = | 8516739 100 |
| X | = | 8516739 100 | ÷ | 47 50 |
| = | 8516739 100 | × | 50 47 |
| = | 8516739 2 | × | 1 47 |
| X | = | 8516739 94 |
| X | = | 90603.606383 |