| ( | 1 | + | 9 50 | ) | ÷ | ( | 1 | + | x | ) | = | 1 | + | 1 20 |
| Multiply both sides of the equation by: | ( | 1 | + | x | ) |
| ( | 1 | + | 9 50 | ) | = | 1 | ( | 1 | + | x | ) | + | 1 20 | ( | 1 | + | x | ) |
| 1 | + | 9 50 | = | 1 | ( | 1 | + | x | ) | + | 1 20 | ( | 1 | + | x | ) |
| 1 | + | 9 50 | = | 1 | × | 1 | + | 1 | x | + | 1 20 | ( | 1 | + | x | ) |
| 1 | + | 9 50 | = | 1 | + | 1 | x | + | 1 20 | ( | 1 | + | x | ) |
59 50 | = | 1 | + | 1 | x | + | 1 20 | ( | 1 | + | x | ) |
59 50 | = | 1 | + | 1 | x | + | 1 20 | × | 1 | + | 1 20 | x |
59 50 | = | 1 | + | 1 | x | + | 1 20 | + | 1 20 | x |
59 50 | = | 21 20 | + | 21 20 | x |
| - | 21 20 | x | = | 21 20 | − | 59 50 |
| - | 21 20 | x | = | - | 13 100 |
13 100 | = | 21 20 | x |
21 20 | x | = | 13 100 |
| x | = | 13 100 | ÷ | 21 20 |
| = | 13 100 | × | 20 21 |
| = | 13 5 | × | 1 21 |
| x | = | 13 105 |
| x | = | 0.12381 |