| ( | 47 | − | 38 | ) | ÷ | ( | 38 | − | 34 | ) | = | ( | 70 | − | t | ) | ÷ | ( | t | − | 56 | ) |
| 方程两边同时乘以: | ( | 38 | − | 34 | ) | , | ( | t | − | 56 | ) |
| ( | 47 | − | 38 | ) | ( | t | − | 56 | ) | = | ( | 70 | − | t | ) | ( | 38 | − | 34 | ) |
| 47 | ( | t | − | 56 | ) | − | 38 | ( | t | − | 56 | ) | = | ( | 70 | − | t | ) | ( | 38 | − | 34 | ) |
| 47 | ( | t | − | 56 | ) | − | 38 | ( | t | − | 56 | ) | = | 70 | ( | 38 | − | 34 | ) | − | t | ( | 38 | − | 34 | ) |
| 47 | t | − | 47 | × | 56 | − | 38 | ( | t | − | 56 | ) | = | 70 | ( | 38 | − | 34 | ) | − | t | ( | 38 | − | 34 | ) |
| 47 | t | − | 47 | × | 56 | − | 38 | ( | t | − | 56 | ) | = | 70 | × | 38 | − | 70 | × | 34 | − | t | ( | 38 | − | 34 | ) |
| 47 | t | − | 2632 | − | 38 | ( | t | − | 56 | ) | = | 2660 | − | 2380 | − | t | ( | 38 | − | 34 | ) |
| 47 | t | − | 2632 | − | 38 | ( | t | − | 56 | ) | = | 280 | − | t | ( | 38 | − | 34 | ) |
| 47 | t | − | 2632 | − | 38 | t | + | 38 | × | 56 | = | 280 | − | t | ( | 38 | − | 34 | ) |
| 47 | t | − | 2632 | − | 38 | t | + | 38 | × | 56 | = | 280 | − | t | × | 38 | + | t | × | 34 |
| 47 | t | − | 2632 | − | 38 | t | + | 2128 | = | 280 | − | t | × | 38 | + | t | × | 34 |
| 9 | t | − | 504 | = | 280 | − | 4 | t |
| 9 | t | + | 4 | t | = | 280 | + | 504 |
| 13 | t | = | 280 | + | 504 |
| 13 | t | = | 784 |
| t | = | 784 | ÷ | 13 |
| = | 784 | × | 1 13 |
| t | = | 784 13 |
| t | = | 60.307692 |