| 300 | ÷ | ( | 500 | − | 200 | − | x | ) | = | 3 2 |
| Multiply both sides of the equation by: | ( | 500 | − | 200 | − | x | ) |
| 300 | = | 3 2 | ( | 500 | − | 200 | − | x | ) |
| 300 | = | 3 2 | × | 500 | − | 3 2 | × | 200 | − | 3 2 | x |
| 300 | = | 750 | − | 300 | − | 3 2 | x |
| 300 | = | 450 | − | 3 2 | x |
3 2 | x | = | 450 | − | 300 |
3 2 | x | = | 150 |
| x | = | 150 | ÷ | 3 2 |
| = | 150 | × | 2 3 |
| = | 50 | × | 2 |
| x | = | 100 |