| 5 | ÷ | 2 | = | a | ( | 0 | − | 5 | ) | ( | 0 | + | 1 | ) |
| 方程左边 = | 5 2 |
5 2 | = | a | ( | 0 | − | 5 | ) | ( | 0 | + | 1 | ) |
| 方程右边 = | a | × | 0 | ( | 0 | + | 1 | ) | − | a | × | 5 | ( | 0 | + | 1 | ) |
| = | a | × | 0 | × | 0 | + | a | × | 0 | × | 1 | − | a | × | 5 | ( | 0 | + | 1 | ) |
| = | a | × | 0 | + | a | × | 0 | − | a | × | 5 | ( | 0 | + | 1 | ) |
| = | 0 | a | − | a | × | 5 | ( | 0 | + | 1 | ) |
| = | 0 | a | − | a | × | 5 | × | 0 | − | a | × | 5 | × | 1 |
| = | 0 | a | − | a | × | 0 | − | a | × | 5 |
| = | - | 5 | a |
5 2 | = | - | 5 | a |
| 5 | a | = | - | 5 2 |
| a | = | - | 5 2 | ÷ | 5 |
| = | - | 5 2 | × | 1 5 |
| = | - | 1 2 | × | 1 |
| a | = | - | 1 2 |
| a | = | - 0.5 |