| 1 | ÷ | 2 | × | ( | 4 | + | 12 | ÷ | x | ) | × | 3 | + | 1 | ÷ | 2 | × | ( | 4 | + | 12 | ÷ | x | ) | x | = | 0 |
| 1 | ÷ | 2 | × | 4 | × | 3 | + | 1 | ÷ | 2 | × | 12 | ÷ | x | × | 3 | + | 1 | ÷ | 2 | × | ( | 4 | + | 12 | ÷ | x | ) | = | 0 |
| 6 | + | 18 | ÷ | x | + | 1 2 | ( | 4 | + | 12 | ÷ | x | ) | x | = | 0 |
| 方程两边同时乘以: | x |
| 6 | x | + | 18 | + | 1 2 | ( | 4 | + | 12 | ÷ | x | ) | x | x | = | 0 |
| 6 | x | + | 18 | + | 1 2 | × | 4 | x | x | + | 1 2 | × | 12 | ÷ | x | × | x | x | = | 0 |
| 6 | x | + | 18 | + | 2 | x | x | + | 6 | ÷ | x | × | x | x | = | 0 |