| 2 | ( | 80 | − | t | ) | = | 22 | ( | t | − | 56 | ) |
| 方程左边 = | 2 | × | 80 | − | 2 | t |
| = | 160 | − | 2 | t |
| 160 | − | 2 | t | = | 22 | ( | t | − | 56 | ) |
| 方程右边 = | 22 | t | − | 22 | × | 56 |
| = | 22 | t | − | 1232 |
| 160 | − | 2 | t | = | 22 | t | − | 1232 |
| - | 2 | t | − | 22 | t | = | - | 1232 | − | 160 |
| - | 24 | t | = | - | 1232 | − | 160 |
| - | 24 | t | = | - | 1392 |
| 1392 | = | 24 | t |
| 24 | t | = | 1392 |
| t | = | 1392 | ÷ | 24 |
| = | 1392 | × | 1 24 |
| = | 58 | × | 1 |
| t | = | 58 |