| ( | 1 | + | X | + | 3 20 | ) | ÷ | ( | 1 | + | X | ) | = | 3 50 | ÷ | 3 5 |
| Multiply both sides of the equation by: | ( | 1 | + | X | ) |
| ( | 1 | + | X | + | 3 20 | ) | = | 3 50 | ÷ | 3 5 | × | ( | 1 | + | X | ) |
| 1 | + | X | + | 3 20 | = | 3 50 | ÷ | 3 5 | × | ( | 1 | + | X | ) |
| 1 | + | X | + | 3 20 | = | 3 50 | ÷ | 3 5 | × | 1 | + | 3 50 | ÷ | 3 5 | × | X |
| 1 | + | X | + | 3 20 | = | 1 10 | + | 1 10 | X |
23 20 | + | X | = | 1 10 | + | 1 10 | X |
| X | − | 1 10 | X | = | 1 10 | − | 23 20 |
9 10 | X | = | 1 10 | − | 23 20 |
9 10 | X | = | - | 21 20 |
| X | = | - | 21 20 | ÷ | 9 10 |
| = | - | 21 20 | × | 10 9 |
| = | - | 7 2 | × | 1 3 |
| X | = | - | 7 6 |
| X | = | - 1.166667 |