| ( | 5 | ( | 443 | + | X | ) | + | 244 | ) | ÷ | ( | 542 | + | X | ) | = | 23 5 |
| Multiply both sides of the equation by: | ( | 542 | + | X | ) |
| ( | 5 | ( | 443 | + | X | ) | + | 244 | ) | = | 23 5 | ( | 542 | + | X | ) |
| 5 | ( | 443 | + | X | ) | + | 244 | = | 23 5 | ( | 542 | + | X | ) |
| 5 | ( | 443 | + | X | ) | + | 244 | = | 23 5 | × | 542 | + | 23 5 | X |
| 5 | ( | 443 | + | X | ) | + | 244 | = | 12466 5 | + | 23 5 | X |
| 5 | × | 443 | + | 5 | X | + | 244 | = | 12466 5 | + | 23 5 | X |
| 2215 | + | 5 | X | + | 244 | = | 12466 5 | + | 23 5 | X |
| 2459 | + | 5 | X | = | 12466 5 | + | 23 5 | X |
| 5 | X | − | 23 5 | X | = | 12466 5 | − | 2459 |
2 5 | X | = | 12466 5 | − | 2459 |
2 5 | X | = | 171 5 |
| X | = | 171 5 | ÷ | 2 5 |
| = | 171 5 | × | 5 2 |
| = | 171 | × | 1 2 |
| X | = | 171 2 |
| X | = | 85.5 |