| 1 | ÷ | ( | x | + | 18 25 | ) | + | 1 | ÷ | ( | 27 25 | − | x | ) | = | 1 | ÷ | x | + | 1 | ÷ | ( | 9 5 | − | x | ) |
| 方程两边同时乘以: | ( | x | + | 18 25 | ) | , | x |
| 1 | x | + | 1 | ÷ | ( | 27 25 | − | x | ) | × | ( | x | + | 18 25 | ) | x | = | 1 | ( | x | + | 18 25 | ) | + | 1 | ÷ | ( | 9 5 | − | x | ) | × | ( | x | + | 18 25 | ) | x |
| 1 | x | + | 1 | ÷ | ( | 27 25 | − | x | ) | × | x | x | + | 1 | ÷ | ( | 27 25 | − | x | ) | × | 18 25 | x | = | 1 | ( | x | + | 18 25 | ) | + | 1 | ÷ | ( | 9 5 | − | x | ) | × | ( | x | + | 18 25 | ) | x |
| 1 | x | + | 1 | ÷ | ( | 27 25 | − | x | ) | × | x | x | + | 1 | ÷ | ( | 27 25 | − | x | ) | × | 18 25 | x | = | 1 | x | + | 1 | × | 18 25 | + | 1 | ÷ | ( | 9 5 | − | x | ) | × | ( | x | + | 18 25 | ) | x |
| 1 | x | + | 1 | ÷ | ( | 27 25 | − | x | ) | × | x | x | + | 18 25 | ÷ | ( | 27 25 | − | x | ) | × | x | = | 1 | x | + | 18 25 | + | 1 | ÷ | ( | 9 5 | − | x | ) | × | ( | x | + | 18 25 | ) | x |
| 方程两边同时乘以: | ( | 27 25 | − | x | ) | , | ( | 9 5 | − | x | ) |
| 1 | x | ( | 27 25 | − | x | ) | ( | 9 5 | − | x | ) | + | 1 | x | x | ( | 9 5 | − | x | ) | + | 18 25 | x | ( | 9 5 | − | x | ) | = | 1 | x | ( | 27 25 | − | x | ) | ( | 9 5 | − | x | ) | + | 18 25 | ( | 27 25 | − | x | ) | ( | 9 5 | − | x | ) | + | 1 | ( | x | + | 18 25 | ) | x | ( | 27 25 | − | x | ) |
| 1 | x | × | 27 25 | ( | 9 5 | − | x | ) | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 1 | x | x | ( | 9 5 | − | x | ) | = | 1 | x | ( | 27 25 | − | x | ) | ( | 9 5 | − | x | ) | + | 18 25 | ( | 27 25 | − | x | ) | ( | 9 5 | − | x | ) | + | 1 | ( | x | + | 18 25 | ) | x | ( | 27 25 | − | x | ) |
| 1 | x | × | 27 25 | ( | 9 5 | − | x | ) | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 1 | x | x | ( | 9 5 | − | x | ) | = | 1 | x | × | 27 25 | ( | 9 5 | − | x | ) | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 18 25 | ( | 27 25 | − | x | ) | ( | 9 5 | − | x | ) | + | 1 |
27 25 | x | ( | 9 5 | − | x | ) | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 1 | x | x | ( | 9 5 | − | x | ) | + | 18 25 | = | 27 25 | x | ( | 9 5 | − | x | ) | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 18 25 | ( | 27 25 | − | x | ) | ( | 9 5 | − | x | ) | + | 1 | ( | x | + | 18 25 | ) |
27 25 | x | × | 9 5 | − | 27 25 | x | x | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 1 | x | = | 27 25 | x | ( | 9 5 | − | x | ) | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 18 25 | ( | 27 25 | − | x | ) | ( | 9 5 | − | x | ) | + | 1 | ( | x | + | 18 25 | ) |
27 25 | x | × | 9 5 | − | 27 25 | x | x | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 1 | x | = | 27 25 | x | × | 9 5 | − | 27 25 | x | x | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 18 25 | ( | 27 25 | − | x | ) |
243 125 | x | − | 27 25 | x | x | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 1 | x | x | = | 243 125 | x | − | 27 25 | x | x | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 18 25 | ( | 27 25 | − | x | ) | ( | 9 5 | − | x | ) |
243 125 | x | − | 27 25 | x | x | − | 1 | x | x | × | 9 5 | + | 1 | x | x | = | 243 125 | x | − | 27 25 | x | x | − | 1 | x | x | ( | 9 5 | − | x | ) | + | 18 25 | ( | 27 25 | − | x | ) | ( | 9 5 | − | x | ) |
243 125 | x | − | 27 25 | x | x | − | 1 | x | x | × | 9 5 | + | 1 | x | x | = | 243 125 | x | − | 27 25 | x | x | − | 1 | x | x | × | 9 5 | + | 1 | x | x |
243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x | = | 243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x |
243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x | = | 243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x |
243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x | = | 243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x |
243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x | = | 243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x |
243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x | = | 243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x |
243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x | = | 243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x |
243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x | = | 243 125 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x |
81 25 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x | = | 729 625 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x |
81 25 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x | = | 729 625 | x | − | 27 25 | x | x | − | 9 5 | x | x | + | 1 | x | x | x |
| x1= | 27 50 |