| 9 | ( | 1 | ÷ | 15 | + | 1 | ÷ | 10 | ) | + | 1 | ÷ | 10 | × | x | = | 1 |
| 方程左边 = | 9 | ( | 1 | ÷ | 15 | + | 1 | ÷ | 10 | ) | + | 1 10 | x |
| 9 | ( | 1 | ÷ | 15 | + | 1 | ÷ | 10 | ) | + | 1 10 | x | = | 1 |
| 方程左边 = | 9 | × | 1 | ÷ | 15 | + | 9 | × | 1 | ÷ | 10 | + | 1 10 | x |
| = | 3 5 | + | 9 10 | + | 1 10 | x |
| = | 3 2 | + | 1 10 | x |
3 2 | + | 1 10 | x | = | 1 |
1 10 | x | = | 1 | − | 3 2 |
1 10 | x | = | - | 1 2 |
| x | = | - | 1 2 | ÷ | 1 10 |
| = | - | 1 2 | × | 10 |
| = | - | 1 | × | 5 |
| x | = | - | 5 |