| ( | 10358 | − | X | ) | ÷ | X | = | - | 669 5000 |
| 方程两边同时乘以: | X |
| ( | 10358 | − | X | ) | = | - | 669 5000 | X |
| 10358 | − | X | = | - | 669 5000 | X |
| - | X | + | 669 5000 | X | = | - | 10358 |
| - | 4331 5000 | X | = | - | 10358 |
| 10358 | = | 4331 5000 | X |
4331 5000 | X | = | 10358 |
| X | = | 10358 | ÷ | 4331 5000 |
| = | 10358 | × | 5000 4331 |
| X | = | 51790000 4331 |
| X | = | 11957.977372 |