| 1 | ÷ | 2 | × | ( | x | − | 1 | ) | = | 2 | − | 1 | ÷ | 5 | × | ( | x | + | 2 | ) |
| 方程左边 = | 1 2 | ( | x | − | 1 | ) |
1 2 | ( | x | − | 1 | ) | = | 2 | − | 1 | ÷ | 5 | × | ( | x | + | 2 | ) |
| 方程左边 = | 1 2 | x | − | 1 2 | × | 1 |
| = | 1 2 | x | − | 1 2 |
1 2 | x | − | 1 2 | = | 2 | − | 1 | ÷ | 5 | × | ( | x | + | 2 | ) |
| 方程右边 = | 2 | − | 1 5 | ( | x | + | 2 | ) |
1 2 | x | − | 1 2 | = | 2 | − | 1 5 | ( | x | + | 2 | ) |
| 方程右边 = | 2 | − | 1 5 | x | − | 1 5 | × | 2 |
| = | 2 | − | 1 5 | x | − | 2 5 |
| = | 8 5 | − | 1 5 | x |
1 2 | x | − | 1 2 | = | 8 5 | − | 1 5 | x |
1 2 | x | + | 1 5 | x | = | 8 5 | + | 1 2 |
7 10 | x | = | 8 5 | + | 1 2 |
7 10 | x | = | 21 10 |
| x | = | 21 10 | ÷ | 7 10 |
| = | 21 10 | × | 10 7 |
| = | 3 | × | 1 |
| x | = | 3 |