| ( | 5 | ÷ | x | ) | + | ( | 4 | ÷ | x | ) | = | ( | 15 | ÷ | 60 | ) |
| 5 | ÷ | x | + | ( | 4 | ÷ | x | ) | = | ( | 15 | ÷ | 60 | ) |
| 5 | ÷ | x | + | ( | 4 | ÷ | x | ) | = | 15 | ÷ | 60 |
| 5 | ÷ | x | + | ( | 4 | ÷ | x | ) | = | 1 4 |
| Multiply both sides of the equation by: | x |
| 5 | + | ( | 4 | ÷ | 1 | ) | × | 1 | = | 1 4 | x |
| 5 | + | 4 | ÷ | 1 | × | 1 | = | 1 4 | x |
| 5 | + | 4 | = | 1 4 | x |
| 9 | = | 1 4 | x |
| - | 1 4 | x | = | - | 9 |
| 9 | = | 1 4 | x |
1 4 | x | = | 9 |
| x | = | 9 | ÷ | 1 4 |
| = | 9 | × | 4 |
| x | = | 36 |