| ( | 3 2 | x | + | 5 | ) | ÷ | 9 10 | × | 11 20 | × | 9 10 | − | 5 | − | 3 4 | x | = | 0 |
| 方程左边 = | ( | 3 2 | x | + | 5 | ) | × | 11 20 | − | 5 | − | 3 4 | x |
| ( | 3 2 | x | + | 5 | ) | × | 11 20 | − | 5 | − | 3 4 | x | = | 0 |
| 方程左边 = | 3 2 | x | × | 11 20 | + | 5 | × | 11 20 | − | 5 | − | 3 4 | x |
| = | 33 40 | x | + | 11 4 | − | 5 | − | 3 4 | x |
| = | 3 40 | x | − | 9 4 |
3 40 | x | − | 9 4 | = | 0 |
3 40 | x | = | 0 | + | 9 4 |
3 40 | x | = | 9 4 |
| x | = | 9 4 | ÷ | 3 40 |
| = | 9 4 | × | 40 3 |
| = | 3 | × | 10 |
| x | = | 30 |