| ( | t | − | 24 | ) | × | 20 | ÷ | 18 | + | 20 | = | t |
| Left side of the equation = | ( | t | − | 24 | ) | × | 10 9 | + | 20 |
| ( | t | − | 24 | ) | × | 10 9 | + | 20 | = | t |
| Left side of the equation = | t | × | 10 9 | − | 24 | × | 10 9 | + | 20 |
| = | t | × | 10 9 | − | 80 3 | + | 20 |
| = | 10 9 | t | − | 20 3 |
10 9 | t | − | 20 3 | = | t |
10 9 | t | − | t | = | 20 3 |
1 9 | t | = | 20 3 |
| t | = | 20 3 | ÷ | 1 9 |
| = | 20 3 | × | 9 |
| = | 20 | × | 3 |
| t | = | 60 |