| ( | 1 | ÷ | 15 2 | + | 1 | ÷ | 5 | ) | × | 1 | + | ( | x | − | 1 | ) | ÷ | 5 | = | 1 |
| 方程左边 = | 1 | ÷ | 15 2 | × | 1 | + | 1 | ÷ | 5 | × | 1 | + | ( | x | − | 1 | ) | × | 1 5 |
| = | 2 15 | + | 1 5 | + | ( | x | − | 1 | ) | × | 1 5 |
| = | 1 3 | + | ( | x | − | 1 | ) | × | 1 5 |
| = | 1 3 | + | x | × | 1 5 | − | 1 | × | 1 5 |
| = | 1 3 | + | x | × | 1 5 | − | 1 5 |
| = | 2 15 | + | 1 5 | x |
2 15 | + | 1 5 | x | = | 1 |
1 5 | x | = | 1 | − | 2 15 |
1 5 | x | = | 13 15 |
| x | = | 13 15 | ÷ | 1 5 |
| = | 13 15 | × | 5 |
| = | 13 3 | × | 1 |
| x | = | 13 3 |
| x | = | 4.333333 |