13 100 | = | 1 20 | x | ÷ | ( | 1 | + | ( | x | − | 1 | ) | × | 1 2 | ) |
| Multiply both sides of the equation by: | ( | 1 | + | ( | x | − | 1 | ) | × | 1 2 | ) |
13 100 | ( | 1 | + | ( | x | − | 1 | ) | × | 1 2 | ) | = | 1 20 | x |
13 100 | × | 1 | + | 13 100 | ( | x | − | 1 | ) | × | 1 2 | = | 1 20 | x |
13 100 | + | 13 200 | ( | x | − | 1 | ) | = | 1 20 | x |
13 100 | + | 13 200 | x | − | 13 200 | × | 1 | = | 1 20 | x |
13 100 | + | 13 200 | x | − | 13 200 | = | 1 20 | x |
13 200 | + | 13 200 | x | = | 1 20 | x |
13 200 | x | − | 1 20 | x | = | - | 13 200 |
3 200 | x | = | - | 13 200 |
| x | = | - | 13 200 | ÷ | 3 200 |
| = | - | 13 200 | × | 200 3 |
| = | - | 13 | × | 1 3 |
| x | = | - | 13 3 |
| x | = | - 4.333333 |