| x | − | 1 2 | x | + | 4 | − | 1 2 | ( | 1 2 | x | + | 4 | ) | + | 4 | = | 10 |
| 方程左边 = | 1 2 | x | + | 8 | − | 1 2 | ( | 1 2 | x | + | 4 | ) |
1 2 | x | + | 8 | − | 1 2 | ( | 1 2 | x | + | 4 | ) | = | 10 |
| 方程左边 = | 1 2 | x | + | 8 | − | 1 2 | × | 1 2 | x | − | 1 2 | × | 4 |
| = | 1 2 | x | + | 8 | − | 1 4 | x | − | 2 |
| = | 1 4 | x | + | 6 |
1 4 | x | + | 6 | = | 10 |
1 4 | x | = | 10 | − | 6 |
1 4 | x | = | 4 |
| x | = | 4 | ÷ | 1 4 |
| = | 4 | × | 4 |
| x | = | 16 |