| 3 | ( | 3 | x | − | 2 | ) | = | 10 | − | 1 2 | ( | x | + | 7 2 | ) |
| 方程左边 = | 3 | × | 3 | x | − | 3 | × | 2 |
| = | 9 | x | − | 6 |
| 9 | x | − | 6 | = | 10 | − | 1 2 | ( | x | + | 7 2 | ) |
| 方程右边 = | 10 | − | 1 2 | x | − | 1 2 | × | 7 2 |
| = | 10 | − | 1 2 | x | − | 7 4 |
| = | 33 4 | − | 1 2 | x |
| 9 | x | − | 6 | = | 33 4 | − | 1 2 | x |
| 9 | x | + | 1 2 | x | = | 33 4 | + | 6 |
19 2 | x | = | 33 4 | + | 6 |
19 2 | x | = | 57 4 |
| x | = | 57 4 | ÷ | 19 2 |
| = | 57 4 | × | 2 19 |
| = | 3 2 | × | 1 |
| x | = | 3 2 |
| x | = | 1.5 |