| ( | 2 | ( | 15 | − | x | − | ( | 15 | − | x | ) | ÷ | 60 | × | 5 | ) | + | x | ) | ÷ | 60 | = | x | ÷ | 5 |
| 方程左边 = | 2 | ( | 15 | − | x | − | ( | 15 | − | x | ) | ÷ | 60 | × | 5 | ) | × | 1 60 | + | x | × | 1 60 |
| = | 1 30 | ( | 15 | − | x | − | ( | 15 | − | x | ) | ÷ | 60 | × | 5 | ) | + | x | × | 1 60 |
| = | 1 30 | × | 15 | − | 1 30 | x | − | 1 30 | ( | 15 | − | x | ) | ÷ | 60 | × | 5 | + | 1 60 | x |
| = | 1 2 | − | 1 30 | x | − | 1 360 | ( | 15 | − | x | ) | + | 1 60 | x |
| = | 1 2 | − | 1 60 | x | − | 1 360 | ( | 15 | − | x | ) |
| = | 1 2 | − | 1 60 | x | − | 1 360 | × | 15 | + | 1 360 | x |
| = | 1 2 | − | 1 60 | x | − | 1 24 | + | 1 360 | x |
| = | 11 24 | − | 1 72 | x |
11 24 | − | 1 72 | x | = | x | ÷ | 5 |
| - | 1 72 | x | − | 1 5 | x | = | - | 11 24 |
| - | 77 360 | x | = | - | 11 24 |
11 24 | = | 77 360 | x |
77 360 | x | = | 11 24 |
| x | = | 11 24 | ÷ | 77 360 |
| = | 11 24 | × | 360 77 |
| = | 1 | × | 15 7 |
| x | = | 15 7 |
| x | = | 2.142857 |