| ( | 1 | ÷ | 40 | + | 1 | ÷ | 60 | ) | x | + | 10 | ÷ | 60 | = | 1 |
| 方程左边 = | ( | 1 | ÷ | 40 | + | 1 | ÷ | 60 | ) | x | + | 1 6 |
| ( | 1 | ÷ | 40 | + | 1 | ÷ | 60 | ) | x | + | 1 6 | = | 1 |
| 方程左边 = | 1 | ÷ | 40 | × | x | + | 1 | ÷ | 60 | × | x | + | 1 6 |
| = | 1 40 | x | + | 1 60 | x | + | 1 6 |
| = | 1 24 | x | + | 1 6 |
1 24 | x | + | 1 6 | = | 1 |
1 24 | x | = | 1 | − | 1 6 |
1 24 | x | = | 5 6 |
| x | = | 5 6 | ÷ | 1 24 |
| = | 5 6 | × | 24 |
| = | 5 | × | 4 |
| x | = | 20 |