| 112 | ÷ | ( | x | − | 1 | ) | = | 112 | ÷ | x | + | 2 |
| 方程两边同时乘以: | ( | x | − | 1 | ) | , | x |
| 112 | x | = | 112 | ( | x | − | 1 | ) | + | 2 | ( | x | − | 1 | ) | x |
| 112 | x | = | 112 | x | − | 112 | × | 1 | + | 2 | ( | x | − | 1 | ) | x |
| 112 | x | = | 112 | x | − | 112 | + | 2 | ( | x | − | 1 | ) | x |
| 112 | x | = | 112 | x | − | 112 | + | 2 | x | x | − | 2 | × | 1 | x |
| 112 | x | = | 112 | x | − | 112 | + | 2 | x | x | − | 2 | x |
| 112 | x | = | 110 | x | − | 112 | + | 2 | x | x |