| ( | X | − | 5000 | ) | × | 3 100 | = | X | − | 223496 25 |
| 方程左边 = | X | × | 3 100 | − | 5000 | × | 3 100 |
| = | X | × | 3 100 | − | 150 |
3 100 | X | − | 150 | = | X | − | 223496 25 |
3 100 | X | − | X | = | - | 223496 25 | + | 150 |
| - | 97 100 | X | = | - | 223496 25 | + | 150 |
| - | 97 100 | X | = | - | 219746 25 |
219746 25 | = | 97 100 | X |
97 100 | X | = | 219746 25 |
| X | = | 219746 25 | ÷ | 97 100 |
| = | 219746 25 | × | 100 97 |
| = | 219746 | × | 4 97 |
| X | = | 878984 97 |
| X | = | 9061.690722 |