| x | − | 12 | = | x | ÷ | 2 | + | 2 | + | ( | x | ÷ | 2 | + | 2 | ) | ÷ | 2 | − | 1 |
| 方程右边 = | 1 2 | x | + | 1 | + | ( | x | ÷ | 2 | + | 2 | ) | × | 1 2 |
| x | − | 12 | = | 1 2 | x | + | 1 | + | ( | x | ÷ | 2 | + | 2 | ) | × | 1 2 |
| 方程右边 = | 1 2 | x | + | 1 | + | x | ÷ | 2 | × | 1 2 | + | 2 | × | 1 2 |
| = | 1 2 | x | + | 1 | + | x | × | 1 4 | + | 1 |
| = | 3 4 | x | + | 2 |
| x | − | 12 | = | 3 4 | x | + | 2 |
| x | − | 3 4 | x | = | 2 | + | 12 |
1 4 | x | = | 2 | + | 12 |
1 4 | x | = | 14 |
| x | = | 14 | ÷ | 1 4 |
| = | 14 | × | 4 |
| x | = | 56 |