40 100 | = | ( | 169 | − | X | ) | × | 169 | × | 100 100 |
| 方程右边 = | ( | 169 | − | X | ) | × | 169 |
40 100 | = | ( | 169 | − | X | ) | × | 169 |
| 方程右边 = | 169 | × | 169 | − | X | × | 169 |
| = | 28561 | − | X | × | 169 |
40 100 | = | 28561 | − | 169 | X |
| 169 | X | = | 28561 | − | 40 100 |
| 169 | X | = | 142803 5 |
| X | = | 142803 5 | ÷ | 169 |
| = | 142803 5 | × | 1 169 |
| X | = | 142803 845 |
| X | = | 168.997633 |