| 1500 | ÷ | ( | 1500 | + | x | ) | = | 3 5 |
| Multiply both sides of the equation by: | ( | 1500 | + | x | ) |
| 1500 | = | 3 5 | ( | 1500 | + | x | ) |
| 1500 | = | 3 5 | × | 1500 | + | 3 5 | x |
| 1500 | = | 900 | + | 3 5 | x |
| - | 3 5 | x | = | 900 | − | 1500 |
| - | 3 5 | x | = | - | 600 |
| 600 | = | 3 5 | x |
3 5 | x | = | 600 |
| x | = | 600 | ÷ | 3 5 |
| = | 600 | × | 5 3 |
| = | 200 | × | 5 |
| x | = | 1000 |