| 1 | ÷ | 2 | × | ( | 6 | − | t | ) | ( | 12 | − | 2 | t | ) | = | 0 |
| 方程左边 = | 1 2 | ( | 6 | − | t | ) | ( | 12 | − | 2 | t | ) |
1 2 | ( | 6 | − | t | ) | ( | 12 | − | 2 | t | ) | = | 0 |
| 方程左边 = | 1 2 | × | 6 | ( | 12 | − | 2 | t | ) | − | 1 2 | t | ( | 12 | − | 2 | t | ) |
| = | 3 | ( | 12 | − | 2 | t | ) | − | 1 2 | t | ( | 12 | − | 2 | t | ) |
| = | 3 | × | 12 | − | 3 | × | 2 | t | − | 1 2 | t | ( | 12 | − | 2 | t | ) |
| = | 36 | − | 6 | t | − | 1 2 | t | ( | 12 | − | 2 | t | ) |
| = | 36 | − | 6 | t | − | 1 2 | t | × | 12 | + | 1 2 | t | × | 2 | t |
| = | 36 | − | 6 | t | − | 6 | t | + | 1 | t | t |
| = | 36 | − | 12 | t | + | 1 | t | t |
| 36 | − | 12 | t | + | 1 | t | t | = | 0 |