| X | − | ( | X | − | 5000 | ) | × | 3 100 | = | 197133 20 |
| 方程左边 = | X | − | X | × | 3 100 | + | 5000 | × | 3 100 |
| = | X | − | X | × | 3 100 | + | 150 |
| = | 97 100 | X | + | 150 |
97 100 | X | + | 150 | = | 197133 20 |
97 100 | X | = | 197133 20 | − | 150 |
97 100 | X | = | 194133 20 |
| X | = | 194133 20 | ÷ | 97 100 |
| = | 194133 20 | × | 100 97 |
| = | 194133 | × | 5 97 |
| X | = | 970665 97 |
| X | = | 10006.85567 |