| X | × | 17331 125000 | + | ( | 22350 | − | X | ) | = | 4000 |
| 方程左边 = | 17331 125000 | X | + | 22350 | − | X |
| = | - | 107669 125000 | X | + | 22350 |
| - | 107669 125000 | X | + | 22350 | = | 4000 |
| - | 107669 125000 | X | = | 4000 | − | 22350 |
| - | 107669 125000 | X | = | - | 18350 |
| 18350 | = | 107669 125000 | X |
107669 125000 | X | = | 18350 |
| X | = | 18350 | ÷ | 107669 125000 |
| = | 18350 | × | 125000 107669 |
| X | = | 2293750000 107669 |
| X | = | 21303.717876 |