| 1 | − | ( | 1 | ÷ | 4 | ) | t | = | 2 | ( | 1 | − | ( | 1 | ÷ | 3 | ) | t | ) |
| 方程左边 = | 1 | − | 1 | ÷ | 4 | × | t |
| = | 1 | − | 1 4 | t |
| 1 | − | 1 4 | t | = | 2 | ( | 1 | − | ( | 1 | ÷ | 3 | ) | t | ) |
| 方程右边 = | 2 | × | 1 | − | 2 | ( | 1 | ÷ | 3 | ) | t |
| = | 2 | − | 2 | ( | 1 | ÷ | 3 | ) | t |
| = | 2 | − | 2 | × | 1 | ÷ | 3 | × | t |
| = | 2 | − | 2 3 | t |
| 1 | − | 1 4 | t | = | 2 | − | 2 3 | t |
| - | 1 4 | t | + | 2 3 | t | = | 2 | − | 1 |
5 12 | t | = | 2 | − | 1 |
5 12 | t | = | 1 |
| t | = | 1 | ÷ | 5 12 |
| = | 1 | × | 12 5 |
| t | = | 12 5 |
| t | = | 2.4 |