| ( | 57 | − | 22 | t | ) | ÷ | ( | 24 | − | 13 | t | ) | = | ( | 22 | ÷ | 13 | ) |
| 方程两边同时乘以: | ( | 24 | − | 13 | t | ) |
| ( | 57 | − | 22 | t | ) | = | ( | 22 | ÷ | 13 | ) | ( | 24 | − | 13 | t | ) |
| 57 | − | 22 | t | = | ( | 22 | ÷ | 13 | ) | ( | 24 | − | 13 | t | ) |
| 57 | − | 22 | t | = | 22 | ÷ | 13 | × | ( | 24 | − | 13 | t | ) |
| 57 | − | 22 | t | = | 22 13 | ( | 24 | − | 13 | t | ) |
| 57 | − | 22 | t | = | 22 13 | × | 24 | − | 22 13 | × | 13 | t |
| 57 | − | 22 | t | = | 528 13 | − | 22 | t |
| - | 22 | t | + | 22 | t | = | 528 13 | − | 57 |
| - | 0 | t | = | 528 13 | − | 57 |
| - | 0 | t | = | - | 213 13 |