| 6 | ( | 2 | x | + | 6 | ) | = | 45 | x | − | 10 | ( | 2 | x | − | 14 | ) |
| 方程左边 = | 6 | × | 2 | x | + | 6 | × | 6 |
| = | 12 | x | + | 36 |
| 12 | x | + | 36 | = | 45 | x | − | 10 | ( | 2 | x | − | 14 | ) |
| 方程右边 = | 45 | x | − | 10 | × | 2 | x | + | 10 | × | 14 |
| = | 45 | x | − | 20 | x | + | 140 |
| = | 25 | x | + | 140 |
| 12 | x | + | 36 | = | 25 | x | + | 140 |
| 12 | x | − | 25 | x | = | 140 | − | 36 |
| - | 13 | x | = | 140 | − | 36 |
| - | 13 | x | = | 104 |
| - | 104 | = | 13 | x |
| 13 | x | = | - | 104 |
| x | = | - | 104 | ÷ | 13 |
| = | - | 104 | × | 1 13 |
| = | - | 8 | × | 1 |
| x | = | - | 8 |