| 2 | ÷ | x | + | 1 | ÷ | ( | x | + | 9 | ) | = | 1 | ÷ | ( | x | + | 5 | ) |
| 方程两边同时乘以: | x | , | ( | x | + | 5 | ) |
| 2 | ( | x | + | 5 | ) | + | 1 | ÷ | ( | x | + | 9 | ) | × | x | ( | x | + | 5 | ) | = | 1 | x |
| 2 | x | + | 2 | × | 5 | + | 1 | ÷ | ( | x | + | 9 | ) | × | x | ( | x | + | 5 | ) | = | 1 | x |
| 2 | x | + | 10 | + | 1 | ÷ | ( | x | + | 9 | ) | × | x | ( | x | + | 5 | ) | = | 1 | x |
| 方程两边同时乘以: | ( | x | + | 9 | ) |
| 2 | x | ( | x | + | 9 | ) | + | 10 | ( | x | + | 9 | ) | + | 1 | x | ( | x | + | 5 | ) | = | 1 | x | ( | x | + | 9 | ) |
| 2 | x | x | + | 2 | x | × | 9 | + | 10 | ( | x | + | 9 | ) | + | 1 | x | ( | x | + | 5 | ) | = | 1 | x | ( | x | + | 9 | ) |
| 2 | x | x | + | 2 | x | × | 9 | + | 10 | ( | x | + | 9 | ) | + | 1 | x | ( | x | + | 5 | ) | = | 1 | x | x | + | 1 | x | × | 9 |
| 2 | x | x | + | 18 | x | + | 10 | ( | x | + | 9 | ) | + | 1 | x | ( | x | + | 5 | ) | = | 1 | x | x | + | 9 | x |
| 2 | x | x | + | 18 | x | + | 10 | x | + | 10 | × | 9 | + | 1 | x | ( | x | + | 5 | ) | = | 1 | x | x | + | 9 | x |
| 2 | x | x | + | 18 | x | + | 10 | x | + | 90 | + | 1 | x | ( | x | + | 5 | ) | = | 1 | x | x | + | 9 | x |
| 2 | x | x | + | 28 | x | + | 90 | + | 1 | x | ( | x | + | 5 | ) | = | 1 | x | x | + | 9 | x |
| 2 | x | x | + | 28 | x | + | 90 | + | 1 | x | x | + | 1 | x | × | 5 | = | 1 | x | x | + | 9 | x |
| 2 | x | x | + | 28 | x | + | 90 | + | 1 | x | x | + | 5 | x | = | 1 | x | x | + | 9 | x |
| 2 | x | x | + | 33 | x | + | 90 | + | 1 | x | x | = | 1 | x | x | + | 9 | x |