| 5 | ( | t | − | 1 | ) | + | 4 | ( | 2 | t | − | 5 | ) | = | 0 |
| Left side of the equation = | 5 | t | − | 5 | × | 1 | + | 4 | ( | 2 | t | − | 5 | ) |
| = | 5 | t | − | 5 | + | 4 | ( | 2 | t | − | 5 | ) |
| = | 5 | t | − | 5 | + | 4 | × | 2 | t | − | 4 | × | 5 |
| = | 5 | t | − | 5 | + | 8 | t | − | 20 |
| = | 13 | t | − | 25 |
| 13 | t | − | 25 | = | 0 |
| 13 | t | = | 0 | + | 25 |
| 13 | t | = | 25 |
| t | = | 25 | ÷ | 13 |
| = | 25 | × | 1 13 |
| t | = | 25 13 |
| t | = | 1.923077 |