| ( | 45 | a | ) | ÷ | ( | a | + | 24 | ) | = | 60 |
| Multiply both sides of the equation by: | ( | a | + | 24 | ) |
| ( | 45 | a | ) | = | 60 | ( | a | + | 24 | ) |
| 45 | a | = | 60 | ( | a | + | 24 | ) |
| 45 | a | = | 60 | a | + | 60 | × | 24 |
| 45 | a | = | 60 | a | + | 1440 |
| 45 | a | − | 60 | a | = | 1440 |
| - | 15 | a | = | 1440 |
| - | 1440 | = | 15 | a |
| 15 | a | = | - | 1440 |
| a | = | - | 1440 | ÷ | 15 |
| = | - | 1440 | × | 1 15 |
| = | - | 96 | × | 1 |
| a | = | - | 96 |