| ( | x | × | 2 | − | 1 | ) | ÷ | x | = | ( | x | × | 4 | − | 6 | x | × | 2 | + | 1 | ) | ÷ | 12 | − | 2 | x | × | 2 |
| 方程两边同时乘以: | x |
| ( | x | × | 2 | − | 1 | ) | = | ( | x | × | 4 | − | 6 | x | × | 2 | + | 1 | ) | ÷ | 12 | × | x | − | 2 | x | × | 2 | x |
| x | × | 2 | − | 1 | = | ( | x | × | 4 | − | 6 | x | × | 2 | + | 1 | ) | ÷ | 12 | × | x | − | 2 | x | × | 2 | x |
| x | × | 2 | − | 1 | = | x | × | 4 | ÷ | 12 | × | x | − | 6 | x | × | 2 | ÷ | 12 | × | x | + | 1 | ÷ | 12 | × | x |
| x | × | 2 | − | 1 | = | x | × | 1 3 | x | − | 1 | x | x | + | 1 12 | x | − | 4 | x | x |