| - | 1 | − | ( | x | × | 3 | − | 2 | ) | = | ( | 3 | x | × | 2 | − | 2 | ) | ( | 1 | − | x | ) |
| 方程左边 = | - | 1 | − | x | × | 3 | + | 2 |
| = | 1 | − | 3 | x |
| 1 | − | 3 | x | = | ( | 3 | x | × | 2 | − | 2 | ) | ( | 1 | − | x | ) |
| 方程右边 = | 3 | x | × | 2 | ( | 1 | − | x | ) | − | 2 | ( | 1 | − | x | ) |
| = | 6 | x | ( | 1 | − | x | ) | − | 2 | ( | 1 | − | x | ) |
| = | 6 | x | × | 1 | − | 6 | x | x | − | 2 | ( | 1 | − | x | ) |
| = | 6 | x | − | 6 | x | x | − | 2 | ( | 1 | − | x | ) |
| = | 6 | x | − | 6 | x | x | − | 2 | × | 1 | + | 2 | x |
| = | 6 | x | − | 6 | x | x | − | 2 | + | 2 | x |
| = | 8 | x | − | 6 | x | x | − | 2 |
| 1 | − | 3 | x | = | 8 | x | − | 6 | x | x | − | 2 |
| x1= | 1 3 |
| x2= | 3 2 |