5 | − | 1 | − | 2 | × | 10 | ÷ | 3 | × | ( | t | − | 15 | ÷ | 4 | ) | = | 2 |
方程左边 = | 5 | − | 1 | − | 20 3 | ( | t | − | 15 | ÷ | 4 | ) |
= | 4 | − | 20 3 | ( | t | − | 15 | ÷ | 4 | ) |
4 | − | 20 3 | ( | t | − | 15 | ÷ | 4 | ) | = | 2 |
方程左边 = | 4 | − | 20 3 | t | + | 20 3 | × | 15 | ÷ | 4 |
= | 4 | − | 20 3 | t | + | 25 |
= | 29 | − | 20 3 | t |
29 | − | 20 3 | t | = | 2 |
- | 20 3 | t | = | 2 | − | 29 |
- | 20 3 | t | = | - | 27 |
27 | = | 20 3 | t |
20 3 | t | = | 27 |
t | = | 27 | ÷ | 20 3 |
= | 27 | × | 3 20 |
t | = | 81 20 |
t | = | 4.05 |