| ( | ( | 2 | ÷ | 15 | ) | + | ( | 3 | ÷ | 15 | ) | ) | + | ( | 3 | ÷ | 15 | ) | x | = | 1 |
| 方程左边 = | ( | 2 | ÷ | 15 | ) | + | ( | 3 | ÷ | 15 | ) | + | ( | 3 | ÷ | 15 | ) | x |
| = | 2 | ÷ | 15 | + | ( | 3 | ÷ | 15 | ) | + | ( | 3 | ÷ | 15 | ) | x |
| = | 2 15 | + | ( | 3 | ÷ | 15 | ) | + | ( | 3 | ÷ | 15 | ) | x |
| = | 2 15 | + | 3 | ÷ | 15 | + | ( | 3 | ÷ | 15 | ) | x |
| = | 2 15 | + | 1 5 | + | ( | 3 | ÷ | 15 | ) | x |
| = | 1 3 | + | ( | 3 | ÷ | 15 | ) | x |
| = | 1 3 | + | 3 | ÷ | 15 | × | x |
| = | 1 3 | + | 1 5 | x |
1 3 | + | 1 5 | x | = | 1 |
1 5 | x | = | 1 | − | 1 3 |
1 5 | x | = | 2 3 |
| x | = | 2 3 | ÷ | 1 5 |
| = | 2 3 | × | 5 |
| x | = | 10 3 |
| x | = | 3.333333 |