| ( | 52 | − | X | ) | ÷ | ( | 36 | − | X | ) | = | 3 |
| Multiply both sides of the equation by: | ( | 36 | − | X | ) |
| ( | 52 | − | X | ) | = | 3 | ( | 36 | − | X | ) |
| 52 | − | X | = | 3 | ( | 36 | − | X | ) |
| 52 | − | X | = | 3 | × | 36 | − | 3 | X |
| 52 | − | X | = | 108 | − | 3 | X |
| - | X | + | 3 | X | = | 108 | − | 52 |
| 2 | X | = | 108 | − | 52 |
| 2 | X | = | 56 |
| X | = | 56 | ÷ | 2 |
| = | 56 | × | 1 2 |
| = | 28 | × | 1 |
| X | = | 28 |