| 26 | ( | t | − | 56 | ) | = | 2 | ( | 80 | − | t | ) |
| 方程左边 = | 26 | t | − | 26 | × | 56 |
| = | 26 | t | − | 1456 |
| 26 | t | − | 1456 | = | 2 | ( | 80 | − | t | ) |
| 方程右边 = | 2 | × | 80 | − | 2 | t |
| = | 160 | − | 2 | t |
| 26 | t | − | 1456 | = | 160 | − | 2 | t |
| 26 | t | + | 2 | t | = | 160 | + | 1456 |
| 28 | t | = | 160 | + | 1456 |
| 28 | t | = | 1616 |
| t | = | 1616 | ÷ | 28 |
| = | 1616 | × | 1 28 |
| = | 404 | × | 1 7 |
| t | = | 404 7 |
| t | = | 57.714286 |