| ( | 11 | + | X | ) | ÷ | ( | 17 | + | X | ) | = | 3 | ÷ | 4 |
| Multiply both sides of the equation by: | ( | 17 | + | X | ) |
| ( | 11 | + | X | ) | = | 3 | ÷ | 4 | × | ( | 17 | + | X | ) |
| 11 | + | X | = | 3 | ÷ | 4 | × | ( | 17 | + | X | ) |
| 11 | + | X | = | 3 | ÷ | 4 | × | 17 | + | 3 | ÷ | 4 | × | X |
| 11 | + | X | = | 51 4 | + | 3 4 | X |
| X | − | 3 4 | X | = | 51 4 | − | 11 |
1 4 | X | = | 51 4 | − | 11 |
1 4 | X | = | 7 4 |
| X | = | 7 4 | ÷ | 1 4 |
| = | 7 4 | × | 4 |
| = | 7 | × | 1 |
| X | = | 7 |