| ( | 1 | ÷ | 8 | + | 1 | ÷ | 12 | ) | × | 4 | + | 1 | ÷ | 12 | × | x | = | 0 |
| 方程左边 = | ( | 1 | ÷ | 8 | + | 1 | ÷ | 12 | ) | × | 4 | + | 1 12 | x |
| ( | 1 | ÷ | 8 | + | 1 | ÷ | 12 | ) | × | 4 | + | 1 12 | x | = | 0 |
| 方程左边 = | 1 | ÷ | 8 | × | 4 | + | 1 | ÷ | 12 | × | 4 | + | 1 12 | x |
| = | 1 2 | + | 1 3 | + | 1 12 | x |
| = | 5 6 | + | 1 12 | x |
5 6 | + | 1 12 | x | = | 0 |
1 12 | x | = | 0 | − | 5 6 |
1 12 | x | = | - | 5 6 |
| x | = | - | 5 6 | ÷ | 1 12 |
| = | - | 5 6 | × | 12 |
| = | - | 5 | × | 2 |
| x | = | - | 10 |