| ( | ( | 3208 | − | X | ) | ÷ | X | ) | × | 100 | = | 4 5 |
| ( | 3208 | − | X | ) | ÷ | X | × | 100 | = | 4 5 |
| Multiply both sides of the equation by: | X |
| ( | 3208 | − | X | ) | × | 100 | = | 4 5 | X |
| 3208 | × | 100 | − | X | × | 100 | = | 4 5 | X |
| 320800 | − | X | × | 100 | = | 4 5 | X |
| - | 100 | X | − | 4 5 | X | = | - | 320800 |
| - | 504 5 | X | = | - | 320800 |
| 320800 | = | 504 5 | X |
504 5 | X | = | 320800 |
| X | = | 320800 | ÷ | 504 5 |
| = | 320800 | × | 5 504 |
| = | 40100 | × | 5 63 |
| X | = | 200500 63 |
| X | = | 3182.539683 |