| ( | X | − | 9 | ) | ÷ | ( | 98 | − | 9 | X | ) | = | 4 |
| Multiply both sides of the equation by: | ( | 98 | − | 9 | X | ) |
| ( | X | − | 9 | ) | = | 4 | ( | 98 | − | 9 | X | ) |
| X | − | 9 | = | 4 | ( | 98 | − | 9 | X | ) |
| X | − | 9 | = | 4 | × | 98 | − | 4 | × | 9 | X |
| X | − | 9 | = | 392 | − | 36 | X |
| X | + | 36 | X | = | 392 | + | 9 |
| 37 | X | = | 392 | + | 9 |
| 37 | X | = | 401 |
| X | = | 401 | ÷ | 37 |
| = | 401 | × | 1 37 |
| X | = | 401 37 |
| X | = | 10.837838 |