| 251 | ÷ | s | = | 173 | ÷ | ( | s | − | 93 | ) |
| Multiply both sides of the equation by: | s | , | ( | s | − | 93 | ) |
| 251 | ( | s | − | 93 | ) | = | 173 | s |
| 251 | s | − | 251 | × | 93 | = | 173 | s |
| 251 | s | − | 23343 | = | 173 | s |
| 251 | s | − | 173 | s | = | 23343 |
| 78 | s | = | 23343 |
| s | = | 23343 | ÷ | 78 |
| = | 23343 | × | 1 78 |
| = | 7781 | × | 1 26 |
| s | = | 7781 26 |
| s | = | 299.269231 |