| ( | 1 | ÷ | 49 | − | x | ) | ( | 1 | + | x | ) | ÷ | ( | 50 | ÷ | 49 | ) | = | 1 | ÷ | 499 |
| 方程两边同时乘以: | ( | 50 | ÷ | 49 | ) |
| ( | 1 | ÷ | 49 | − | x | ) | ( | 1 | + | x | ) | = | 1 | ÷ | 499 | × | ( | 50 | ÷ | 49 | ) |
| 1 | ÷ | 49 | × | ( | 1 | + | x | ) | − | x | ( | 1 | + | x | ) | = | 1 | ÷ | 499 | × | ( | 50 | ÷ | 49 | ) |
| 1 | ÷ | 49 | × | ( | 1 | + | x | ) | − | x | ( | 1 | + | x | ) | = | 1 | ÷ | 499 | × | 50 | ÷ | 49 |
1 49 | ( | 1 | + | x | ) | − | x | ( | 1 | + | x | ) | = | 50 24451 |
1 49 | × | 1 | + | 1 49 | x | − | x | ( | 1 | + | x | ) | = | 50 24451 |
1 49 | + | 1 49 | x | − | x | ( | 1 | + | x | ) | = | 50 24451 |
1 49 | + | 1 49 | x | − | x | × | 1 | − | x | x | = | 50 24451 |
1 49 | − | 48 49 | x | − | x | x | = | 50 24451 |