1723 25 | − | 1 2 | x | x | × | 177 10 | × | 59 100 | − | ( | x | − | 39 20 | ) | x | − | 39 20 | × | 40 | × | 59 | = | 0 |
| 方程左边 = | 1723 25 | − | 10443 2000 | x | x | − | ( | x | − | 39 20 | ) | x | − | 4602 |
| = | - | 113327 25 | − | 10443 2000 | x | x | − | ( | x | − | 39 20 | ) | x |
| - | 113327 25 | − | 10443 2000 | x | x | − | ( | x | − | 39 20 | ) | x | = | 0 |
| 方程左边 = | - | 113327 25 | − | 10443 2000 | x | x | − | x | x | + | 39 20 | x |
| - | 113327 25 | − | 10443 2000 | x | x | − | x | x | + | 39 20 | x | = | 0 |