| - | 1200 | ÷ | 273 | + | 1 | ÷ | x | + | 1 | ÷ | ( | 1 | − | x | ) | = | 0 |
| 方程两边同时乘以: | x |
| - | 1200 | ÷ | 273 | × | x | + | 1 | + | 1 | ÷ | ( | 1 | − | x | ) | × | x | = | 0 |
| 方程两边同时乘以: | ( | 1 | − | x | ) |
| - | 1200 | ÷ | 273 | × | x | ( | 1 | − | x | ) | + | 1 | ( | 1 | − | x | ) | + | 1 | x | = | 0 |
| - | 1200 | ÷ | 273 | × | x | × | 1 | + | 1200 | ÷ | 273 | × | x | x | + | 1 | ( | 1 | − | x | ) | + | 1 | x | = | 0 |
| - | 400 91 | x | + | 400 91 | x | x | + | 1 | ( | 1 | − | x | ) | + | 1 | x | = | 0 |
| - | 309 91 | x | + | 400 91 | x | x | + | 1 | ( | 1 | − | x | ) | = | 0 |
| - | 309 91 | x | + | 400 91 | x | x | + | 1 | × | 1 | − | 1 | x | = | 0 |
| - | 309 91 | x | + | 400 91 | x | x | + | 1 | − | 1 | x | = | 0 |
| - | 400 91 | x | + | 400 91 | x | x | + | 1 | = | 0 |
| x1= | 7 20 |
| x2= | 13 20 |