| 27 | ( | t | − | 56 | ) | = | 1 | ( | 80 | − | t | ) |
| Left side of the equation = | 27 | t | − | 27 | × | 56 |
| = | 27 | t | − | 1512 |
| 27 | t | − | 1512 | = | 1 | ( | 80 | − | t | ) |
| Right side of the equation = | 1 | × | 80 | − | 1 | t |
| = | 80 | − | 1 | t |
| 27 | t | − | 1512 | = | 80 | − | 1 | t |
| 27 | t | + | 1 | t | = | 80 | + | 1512 |
| 28 | t | = | 80 | + | 1512 |
| 28 | t | = | 1592 |
| t | = | 1592 | ÷ | 28 |
| = | 1592 | × | 1 28 |
| = | 398 | × | 1 7 |
| t | = | 398 7 |
| t | = | 56.857143 |