| 6 | ( | x | − | 3 | ) | + | 6 | = | 10 | − | 4 | ( | x | − | 2 | ) |
| 方程左边 = | 6 | x | − | 6 | × | 3 | + | 6 |
| = | 6 | x | − | 18 | + | 6 |
| = | 6 | x | − | 12 |
| 6 | x | − | 12 | = | 10 | − | 4 | ( | x | − | 2 | ) |
| 方程右边 = | 10 | − | 4 | x | + | 4 | × | 2 |
| = | 10 | − | 4 | x | + | 8 |
| = | 18 | − | 4 | x |
| 6 | x | − | 12 | = | 18 | − | 4 | x |
| 6 | x | + | 4 | x | = | 18 | + | 12 |
| 10 | x | = | 18 | + | 12 |
| 10 | x | = | 30 |
| x | = | 30 | ÷ | 10 |
| = | 30 | × | 1 10 |
| = | 3 | × | 1 |
| x | = | 3 |