13 100 | = | 1 20 | x | ÷ | ( | 1 | + | ( | x | − | 1 | ) | × | 1 20 | ) |
| 方程两边同时乘以: | ( | 1 | + | ( | x | − | 1 | ) | × | 1 20 | ) |
13 100 | ( | 1 | + | ( | x | − | 1 | ) | × | 1 20 | ) | = | 1 20 | x |
13 100 | × | 1 | + | 13 100 | ( | x | − | 1 | ) | × | 1 20 | = | 1 20 | x |
13 100 | + | 13 2000 | ( | x | − | 1 | ) | = | 1 20 | x |
13 100 | + | 13 2000 | x | − | 13 2000 | × | 1 | = | 1 20 | x |
13 100 | + | 13 2000 | x | − | 13 2000 | = | 1 20 | x |
247 2000 | + | 13 2000 | x | = | 1 20 | x |
13 2000 | x | − | 1 20 | x | = | - | 247 2000 |
| - | 87 2000 | x | = | - | 247 2000 |
247 2000 | = | 87 2000 | x |
87 2000 | x | = | 247 2000 |
| x | = | 247 2000 | ÷ | 87 2000 |
| = | 247 2000 | × | 2000 87 |
| = | 247 | × | 1 87 |
| x | = | 247 87 |
| x | = | 2.83908 |