| 1 | ÷ | x | + | 1 | ÷ | ( | x | + | 10 | ) | + | 1 | ÷ | ( | x | + | 12 | ) | = | 1 | ÷ | ( | x | + | 5 | ) |
| 方程两边同时乘以: | x | , | ( | x | + | 5 | ) |
| 1 | ( | x | + | 5 | ) | + | 1 | ÷ | ( | x | + | 10 | ) | × | x | ( | x | + | 5 | ) | + | 1 | ÷ | ( | x | + | 12 | ) | × | x | ( | x | + | 5 | ) | = | 1 | x |
| 1 | x | + | 1 | × | 5 | + | 1 | ÷ | ( | x | + | 10 | ) | × | x | ( | x | + | 5 | ) | + | 1 | ÷ | ( | x | + | 12 | ) | × | x | ( | x | + | 5 | ) | = | 1 | x |
| 1 | x | + | 5 | + | 1 | ÷ | ( | x | + | 10 | ) | × | x | ( | x | + | 5 | ) | + | 1 | ÷ | ( | x | + | 12 | ) | × | x | ( | x | + | 5 | ) | = | 1 | x |
| 方程两边同时乘以: | ( | x | + | 10 | ) |
| 1 | x | ( | x | + | 10 | ) | + | 5 | ( | x | + | 10 | ) | + | 1 | x | ( | x | + | 5 | ) | + | 1 | ÷ | ( | x | + | 12 | ) | × | x | ( | x | + | 5 | ) | = | 1 | x | ( | x | + | 10 | ) |
| 1 | x | x | + | 1 | x | × | 10 | + | 5 | ( | x | + | 10 | ) | + | 1 | x | ( | x | + | 5 | ) | + | 1 | = | 1 | x | ( | x | + | 10 | ) |
| 1 | x | x | + | 1 | x | × | 10 | + | 5 | ( | x | + | 10 | ) | + | 1 | x | ( | x | + | 5 | ) | + | 1 | = | 1 | x | x | + | 1 | x | × | 10 |
| 1 | x | x | + | 10 | x | + | 5 | ( | x | + | 10 | ) | + | 1 | x | ( | x | + | 5 | ) | + | 1 | ÷ | ( | x | + | 12 | ) | = | 1 | x | x | + | 10 | x |
| 方程两边同时乘以: | ( | x | + | 12 | ) |
| 1 | x | x | ( | x | + | 12 | ) | + | 10 | x | ( | x | + | 12 | ) | + | 5 | ( | x | + | 10 | ) | ( | x | + | 12 | ) | + | 1 | x | = | 1 | x | x | ( | x | + | 12 | ) | + | 10 | x | ( | x | + | 12 | ) |
| 1 | x | x | x | + | 1 | x | x | × | 12 | + | 10 | x | ( | x | + | 12 | ) | + | 5 | = | 1 | x | x | ( | x | + | 12 | ) | + | 10 | x | ( | x | + | 12 | ) |
| 1 | x | x | x | + | 1 | x | x | × | 12 | + | 10 | x | ( | x | + | 12 | ) | + | 5 | = | 1 | x | x | x | + | 1 | x | x | × | 12 | + | 10 | x | ( | x | + | 12 | ) |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | ( | x | + | 12 | ) | + | 5 | ( | x | + | 10 | ) | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | ( | x | + | 12 | ) |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 10 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | ( | x | + | 12 | ) |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 10 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 10 | x |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 180 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 180 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 180 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x |
| 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 230 | x | = | 1 | x | x | x | + | 12 | x | x | + | 10 | x | x | + | 120 | x |