| - | 1 | ÷ | 9 | × | ( | x | + | 3 | ÷ | 2 | ) | ( | x | + | 3 | ÷ | 2 | ) | + | 9 | ÷ | 4 | = | - | 2 |
| 方程左边 = | - | 1 9 | ( | x | + | 3 | ÷ | 2 | ) | ( | x | + | 3 | ÷ | 2 | ) | + | 9 4 |
| - | 1 9 | ( | x | + | 3 | ÷ | 2 | ) | ( | x | + | 3 | ÷ | 2 | ) | + | 9 4 | = | - | 2 |
| 方程左边 = | - | 1 9 | x | ( | x | + | 3 | ÷ | 2 | ) | − | 1 9 | × | 3 | ÷ | 2 | × | ( | x | + | 3 | ÷ | 2 | ) | + | 9 4 |
| = | - | 1 9 | x | ( | x | + | 3 | ÷ | 2 | ) | − | 1 6 | ( | x | + | 3 | ÷ | 2 | ) | + | 9 4 |
| = | - | 1 9 | x | x | − | 1 9 | x | × | 3 | ÷ | 2 | − | 1 6 | ( | x | + | 3 | ÷ | 2 | ) | + | 9 4 |
| = | - | 1 9 | x | x | − | 1 6 | x | − | 1 6 | ( | x | + | 3 | ÷ | 2 | ) | + | 9 4 |
| = | - | 1 9 | x | x | − | 1 6 | x | − | 1 6 | x | − | 1 6 | × | 3 | ÷ | 2 | + | 9 4 |
| = | - | 1 9 | x | x | − | 1 6 | x | − | 1 6 | x | − | 1 4 | + | 9 4 |
| = | - | 1 9 | x | x | − | 1 3 | x | + | 2 |
| - | 1 9 | x | x | − | 1 3 | x | + | 2 | = | - | 2 |