| ( | 415 | − | x | ) | ÷ | ( | 415 | x | ( | x | − | 1 | ) | ) | = | 23 50000 |
| 方程两边同时乘以: | ( | 415 | x | ( | x | − | 1 | ) | ) |
| ( | 415 | − | x | ) | = | 23 50000 | ( | 415 | x | ( | x | − | 1 | ) | ) |
| 415 | − | x | = | 23 50000 | ( | 415 | x | ( | x | − | 1 | ) | ) |
| 415 | − | x | = | 23 50000 | × | 415 | x | ( | x | − | 1 | ) |
| 415 | − | x | = | 1909 10000 | x | ( | x | − | 1 | ) |
| 415 | − | x | = | 1909 10000 | x | x | − | 1909 10000 | x | × | 1 |
| 415 | − | x | = | 1909 10000 | x | x | − | 1909 10000 | x |