| 7 | ÷ | 6 | − | 4 | ÷ | 3 | × | n | = | - | 3 | ÷ | 2 | × | n | + | 2 | ( | n | + | 3 | ÷ | 2 | ) |
| 方程左边 = | 7 6 | − | 4 3 | n |
7 6 | − | 4 3 | n | = | - | 3 | ÷ | 2 | × | n | + | 2 | ( | n | + | 3 | ÷ | 2 | ) |
| 方程右边 = | - | 3 2 | n | + | 2 | ( | n | + | 3 | ÷ | 2 | ) |
7 6 | − | 4 3 | n | = | - | 3 2 | n | + | 2 | ( | n | + | 3 | ÷ | 2 | ) |
| 方程右边 = | - | 3 2 | n | + | 2 | n | + | 2 | × | 3 | ÷ | 2 |
| = | - | 3 2 | n | + | 2 | n | + | 3 |
| = | 1 2 | n | + | 3 |
7 6 | − | 4 3 | n | = | 1 2 | n | + | 3 |
| - | 4 3 | n | − | 1 2 | n | = | 3 | − | 7 6 |
| - | 11 6 | n | = | 3 | − | 7 6 |
| - | 11 6 | n | = | 11 6 |
| - | 11 6 | = | 11 6 | n |
11 6 | n | = | - | 11 6 |
| n | = | - | 11 6 | ÷ | 11 6 |
| = | - | 11 6 | × | 6 11 |
| = | - | 1 | × | 1 |
| n | = | - | 1 |