| 2 | ( | x | − | 6 | ) | + | 3 | ( | 4 | x | − | 5 | ) | = | 9 | ( | 1 | − | 2 | x | ) |
| 方程左边 = | 2 | x | − | 2 | × | 6 | + | 3 | ( | 4 | x | − | 5 | ) |
| = | 2 | x | − | 12 | + | 3 | ( | 4 | x | − | 5 | ) |
| = | 2 | x | − | 12 | + | 3 | × | 4 | x | − | 3 | × | 5 |
| = | 2 | x | − | 12 | + | 12 | x | − | 15 |
| = | 14 | x | − | 27 |
| 14 | x | − | 27 | = | 9 | ( | 1 | − | 2 | x | ) |
| 方程右边 = | 9 | × | 1 | − | 9 | × | 2 | x |
| = | 9 | − | 18 | x |
| 14 | x | − | 27 | = | 9 | − | 18 | x |
| 14 | x | + | 18 | x | = | 9 | + | 27 |
| 32 | x | = | 9 | + | 27 |
| 32 | x | = | 36 |
| x | = | 36 | ÷ | 32 |
| = | 36 | × | 1 32 |
| = | 9 | × | 1 8 |
| x | = | 9 8 |
| x | = | 1.125 |