| ( | 1 | ÷ | x | ) | − | 1 50 | ÷ | ( | 11 | − | x | ) | − | 49 50 | ÷ | ( | 221 | ÷ | 11 | − | x | ) | = | 0 |
| 方程两边同时乘以: | ( | 11 | − | x | ) |
| ( | 1 | ÷ | x | ) | ( | 11 | − | x | ) | − | 1 50 | − | 49 50 | ÷ | ( | 221 | ÷ | 11 | − | x | ) | × | ( | 11 | − | x | ) | = | 0 |
| 1 | ÷ | x | × | ( | 11 | − | x | ) | − | 1 50 | − | 49 50 | ÷ | ( | 221 | ÷ | 11 | − | x | ) | × | ( | 11 | − | x | ) | = | 0 |
| 方程两边同时乘以: | x |
| 1 | ( | 11 | − | x | ) | − | 1 50 | x | − | 49 50 | ÷ | ( | 221 | ÷ | 11 | − | x | ) | × | ( | 11 | − | x | ) | x | = | 0 |
| 1 | × | 11 | − | 1 | x | − | 1 50 | x | − | 49 50 | ÷ | ( | 221 | ÷ | 11 | − | x | ) | × | ( | 11 | − | x | ) | x | = | 0 |
| 11 | − | 1 | x | − | 1 50 | x | − | 49 50 | ÷ | ( | 221 | ÷ | 11 | − | x | ) | × | ( | 11 | − | x | ) | x | = | 0 |
| 11 | − | 51 50 | x | − | 49 50 | ÷ | ( | 221 | ÷ | 11 | − | x | ) | × | ( | 11 | − | x | ) | x | = | 0 |
| 方程两边同时乘以: | ( | 221 | ÷ | 11 | − | x | ) |
| 11 | ( | 221 | ÷ | 11 | − | x | ) | − | 51 50 | x | ( | 221 | ÷ | 11 | − | x | ) | − | 49 50 | ( | 11 | − | x | ) | x | = | 0 |
| 11 | × | 221 | ÷ | 11 | − | 11 | x | − | 51 50 | x | ( | 221 | ÷ | 11 | − | x | ) | − | 49 50 | ( | 11 | − | x | ) | x | = | 0 |
| 221 | − | 11 | x | − | 51 50 | x | ( | 221 | ÷ | 11 | − | x | ) | − | 49 50 | ( | 11 | − | x | ) | x | = | 0 |
| 221 | − | 11 | x | − | 51 50 | x | × | 221 | ÷ | 11 | + | 51 50 | x | x | − | 49 50 | ( | 11 | − | x | ) | = | 0 |
| 221 | − | 11 | x | − | 11271 550 | x | + | 51 50 | x | x | − | 49 50 | ( | 11 | − | x | ) | x | = | 0 |
| 221 | − | 17321 550 | x | + | 51 50 | x | x | − | 49 50 | ( | 11 | − | x | ) | x | = | 0 |
| 221 | − | 17321 550 | x | + | 51 50 | x | x | − | 49 50 | × | 11 | x | + | 49 50 | x | x | = | 0 |
| 221 | − | 17321 550 | x | + | 51 50 | x | x | − | 539 50 | x | + | 49 50 | x | x | = | 0 |
| 221 | − | 465 11 | x | + | 51 50 | x | x | + | 49 50 | x | x | = | 0 |