| ( | 2 | x | + | 11 | ) | ÷ | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) | = | ( | 2 | x | + | 11 | ) | ÷ | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) |
| 方程两边同时乘以: | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) | , | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) |
| ( | 2 | x | + | 11 | ) | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | = | ( | 2 | x | + | 11 | ) | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | + | 11 | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | = | ( | 2 | x | + | 11 | ) | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | + | 11 | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | = | 2 | x | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) | + | 11 | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | ( | x | + | 3 | ) | ( | x | + | 8 | ) | + | 11 | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | = | 2 | x | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) | + | 11 | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | ( | x | + | 3 | ) | ( | x | + | 8 | ) | + | 11 | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | = | 2 | x | ( | x | + | 2 | ) | ( | x | + | 9 | ) | + | 11 | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | x | ( | x | + | 8 | ) | + | 2 | x | × | 3 | ( | x | + | 8 | ) | + | 11 | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | = | 2 | x | ( | x | + | 2 | ) | ( | x | + | 9 | ) | + | 11 | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | x | ( | x | + | 8 | ) | + | 2 | x | × | 3 | ( | x | + | 8 | ) | + | 11 | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | = | 2 | x | x | ( | x | + | 9 | ) | + | 2 | x | × | 2 | ( | x | + | 9 | ) | + | 11 | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | x | ( | x | + | 8 | ) | + | 6 | x | ( | x | + | 8 | ) | + | 11 | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | = | 2 | x | x | ( | x | + | 9 | ) | + | 4 | x | ( | x | + | 9 | ) | + | 11 | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | x | x | + | 2 | x | x | × | 8 | + | 6 | x | ( | x | + | 8 | ) | + | 11 | = | 2 | x | x | ( | x | + | 9 | ) | + | 4 | x | ( | x | + | 9 | ) | + | 11 | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | x | x | + | 2 | x | x | × | 8 | + | 6 | x | ( | x | + | 8 | ) | + | 11 | = | 2 | x | x | x | + | 2 | x | x | × | 9 | + | 4 | x | ( | x | + | 9 | ) | + | 11 |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | ( | x | + | 8 | ) | + | 11 | ( | ( | x | + | 3 | ) | ( | x | + | 8 | ) | ) | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | ( | x | + | 9 | ) | + | 11 | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 6 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | ( | x | + | 9 | ) | + | 11 | ( | ( | x | + | 2 | ) | ( | x | + | 9 | ) | ) |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 6 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 4 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 48 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 36 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 48 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 36 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 48 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 36 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 48 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 36 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 48 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 36 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 48 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 36 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 48 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 36 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 48 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 36 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 48 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 36 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 136 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 135 | x |
| 2 | x | x | x | + | 16 | x | x | + | 6 | x | x | + | 136 | x | = | 2 | x | x | x | + | 18 | x | x | + | 4 | x | x | + | 135 | x |
| x1= | - | 11 2 |