| ( | 207 25 | − | x | ) | ( | 207 25 | − | x | ) | × | 157 50 | × | 1 2 | = | x | ( | 207 25 | − | x | ) | × | 2 |
| 方程左边 = | ( | 207 25 | − | x | ) | ( | 207 25 | − | x | ) | × | 157 100 |
| ( | 207 25 | − | x | ) | ( | 207 25 | − | x | ) | × | 157 100 | = | x | ( | 207 25 | − | x | ) | × | 2 |
| 方程左边 = | 207 25 | ( | 207 25 | − | x | ) | × | 157 100 | − | x | ( | 207 25 | − | x | ) | × | 157 100 |
| = | 32499 2500 | ( | 207 25 | − | x | ) | − | x | ( | 207 25 | − | x | ) | × | 157 100 |
| = | 32499 2500 | × | 207 25 | − | 32499 2500 | x | − | x | ( | 207 25 | − | x | ) | × | 157 100 |
| = | 6727293 62500 | − | 32499 2500 | x | − | x | ( | 207 25 | − | x | ) | × | 157 100 |
| = | 6727293 62500 | − | 32499 2500 | x | − | x | × | 207 25 | × | 157 100 | + | x | x | × | 157 100 |
| = | 6727293 62500 | − | 32499 2500 | x | − | x | × | 32499 2500 | + | x | x | × | 157 100 |
| = | 6727293 62500 | − | 32499 1250 | x | + | x | x | × | 157 100 |
6727293 62500 | − | 32499 1250 | x | + | x | x | × | 157 100 | = | x | ( | 207 25 | − | x | ) | × | 2 |
| 方程右边 = | x | × | 207 25 | × | 2 | − | x | x | × | 2 |
| = | x | × | 414 25 | − | x | x | × | 2 |
6727293 62500 | − | 32499 1250 | x | + | x | x | × | 157 100 | = | 414 25 | x | − | x | x | × | 2 |
| x1= | 207 25 |