| X | ÷ | ( | 4320 | − | X | ) | = | 13 100 |
| Multiply both sides of the equation by: | ( | 4320 | − | X | ) |
| X | = | 13 100 | ( | 4320 | − | X | ) |
| X | = | 13 100 | × | 4320 | − | 13 100 | X |
| X | = | 2808 5 | − | 13 100 | X |
| X | + | 13 100 | X | = | 2808 5 |
113 100 | X | = | 2808 5 |
| X | = | 2808 5 | ÷ | 113 100 |
| = | 2808 5 | × | 100 113 |
| = | 2808 | × | 20 113 |
| X | = | 56160 113 |
| X | = | 496.99115 |