| ( | 660 | ÷ | ( | 3 2 | + | 1 | + | ( | x | ÷ | 30 | ) | + | 3 2 | ( | ( | x | ÷ | 3 | ) | ÷ | 100 | ) | ) | ) | ÷ | 60 | = | 0 |
| 660 | ÷ | ( | 3 2 | + | 1 | + | ( | x | ÷ | 30 | ) | + | 3 2 | ( | ( | x | ÷ | 3 | ) | ÷ | 100 | ) | ) | ÷ | 60 | = | 0 |
| 11 | ÷ | ( | 3 2 | + | 1 | + | ( | x | ÷ | 30 | ) | + | 3 2 | ( | ( | x | ÷ | 3 | ) | ÷ | 100 | ) | ) | = | 0 |
| 方程两边同时乘以: | ( | 3 2 | + | 1 | + | ( | x | ÷ | 30 | ) | + | 3 2 | ( | ( | x | ÷ | 3 | ) | ÷ | 100 | ) | ) |
| 11 | = | 0 |
| = | 0 | − | 11 |