| ( | ( | x | + | 2 | ) | ÷ | 2 | ) | − | ( | ( | x | − | 1 | ) | ÷ | 3 | ) | = | 1 |
| 方程左边 = | ( | x | + | 2 | ) | ÷ | 2 | − | ( | ( | x | − | 1 | ) | ÷ | 3 | ) |
| = | x | × | 1 2 | + | 2 | × | 1 2 | − | ( | ( | x | − | 1 | ) | ÷ | 3 | ) |
| = | x | × | 1 2 | + | 1 | − | ( | ( | x | − | 1 | ) | ÷ | 3 | ) |
| = | 1 2 | x | + | 1 | − | ( | x | − | 1 | ) | ÷ | 3 |
| = | 1 2 | x | + | 1 | − | x | × | 1 3 | + | 1 | × | 1 3 |
| = | 1 2 | x | + | 1 | − | x | × | 1 3 | + | 1 3 |
| = | 1 6 | x | + | 4 3 |
1 6 | x | + | 4 3 | = | 1 |
1 6 | x | = | 1 | − | 4 3 |
1 6 | x | = | - | 1 3 |
| x | = | - | 1 3 | ÷ | 1 6 |
| = | - | 1 3 | × | 6 |
| = | - | 1 | × | 2 |
| x | = | - | 2 |