| 9 | ÷ | 13 | × | ( | x | + | 60 | ) | = | 5 | ÷ | 6 | × | x | − | 60 |
| 方程左边 = | 9 13 | ( | x | + | 60 | ) |
9 13 | ( | x | + | 60 | ) | = | 5 | ÷ | 6 | × | x | − | 60 |
| 方程左边 = | 9 13 | x | + | 9 13 | × | 60 |
| = | 9 13 | x | + | 540 13 |
9 13 | x | + | 540 13 | = | 5 | ÷ | 6 | × | x | − | 60 |
| 方程右边 = | 5 6 | x | − | 60 |
9 13 | x | + | 540 13 | = | 5 6 | x | − | 60 |
9 13 | x | − | 5 6 | x | = | - | 60 | − | 540 13 |
| - | 11 78 | x | = | - | 60 | − | 540 13 |
| - | 11 78 | x | = | - | 1320 13 |
1320 13 | = | 11 78 | x |
11 78 | x | = | 1320 13 |
| x | = | 1320 13 | ÷ | 11 78 |
| = | 1320 13 | × | 78 11 |
| = | 120 | × | 6 |
| x | = | 720 |