| 3600 | ÷ | ( | 3 2 | x | ) | + | 10 | = | 3200 | ÷ | x |
| Multiply both sides of the equation by: | ( | 3 2 | x | ) |
| 3600 | + | 10 | ( | 3 2 | x | ) | = | 3200 | ÷ | 1 | × | ( | 3 2 | × | 1 | ) |
| 3600 | + | 10 | × | 3 2 | x | = | 3200 | ÷ | 1 | × | ( | 3 2 | × | 1 | ) |
| 3600 | + | 10 | × | 3 2 | x | = | 3200 | ÷ | 1 | × | 3 2 | × | 1 |
| 3600 | + | 15 | x | = | 4800 |
| 15 | x | = | 4800 | − | 3600 |
| 15 | x | = | 1200 |
| x | = | 1200 | ÷ | 15 |
| = | 1200 | × | 1 15 |
| = | 80 | × | 1 |
| x | = | 80 |