| 4 | ÷ | 15 | × | ( | x | + | 2 | ) | − | x | ÷ | 9 | = | 1 |
| 方程左边 = | 4 15 | ( | x | + | 2 | ) | − | x | × | 1 9 |
4 15 | ( | x | + | 2 | ) | − | 1 9 | x | = | 1 |
| 方程左边 = | 4 15 | x | + | 4 15 | × | 2 | − | 1 9 | x |
| = | 4 15 | x | + | 8 15 | − | 1 9 | x |
| = | 7 45 | x | + | 8 15 |
7 45 | x | + | 8 15 | = | 1 |
7 45 | x | = | 1 | − | 8 15 |
7 45 | x | = | 7 15 |
| x | = | 7 15 | ÷ | 7 45 |
| = | 7 15 | × | 45 7 |
| = | 1 | × | 3 |
| x | = | 3 |