| ( | 58 | − | 37 | ) | ÷ | ( | 37 | − | 26 | ) | = | ( | 80 | − | t | ) | ÷ | ( | t | − | 56 | ) |
| 方程两边同时乘以: | ( | 37 | − | 26 | ) | , | ( | t | − | 56 | ) |
| ( | 58 | − | 37 | ) | ( | t | − | 56 | ) | = | ( | 80 | − | t | ) | ( | 37 | − | 26 | ) |
| 58 | ( | t | − | 56 | ) | − | 37 | ( | t | − | 56 | ) | = | ( | 80 | − | t | ) | ( | 37 | − | 26 | ) |
| 58 | ( | t | − | 56 | ) | − | 37 | ( | t | − | 56 | ) | = | 80 | ( | 37 | − | 26 | ) | − | t | ( | 37 | − | 26 | ) |
| 58 | t | − | 58 | × | 56 | − | 37 | ( | t | − | 56 | ) | = | 80 | ( | 37 | − | 26 | ) | − | t | ( | 37 | − | 26 | ) |
| 58 | t | − | 58 | × | 56 | − | 37 | ( | t | − | 56 | ) | = | 80 | × | 37 | − | 80 | × | 26 | − | t | ( | 37 | − | 26 | ) |
| 58 | t | − | 3248 | − | 37 | ( | t | − | 56 | ) | = | 2960 | − | 2080 | − | t | ( | 37 | − | 26 | ) |
| 58 | t | − | 3248 | − | 37 | ( | t | − | 56 | ) | = | 880 | − | t | ( | 37 | − | 26 | ) |
| 58 | t | − | 3248 | − | 37 | t | + | 37 | × | 56 | = | 880 | − | t | ( | 37 | − | 26 | ) |
| 58 | t | − | 3248 | − | 37 | t | + | 37 | × | 56 | = | 880 | − | t | × | 37 | + | t | × | 26 |
| 58 | t | − | 3248 | − | 37 | t | + | 2072 | = | 880 | − | t | × | 37 | + | t | × | 26 |
| 21 | t | − | 1176 | = | 880 | − | 11 | t |
| 21 | t | + | 11 | t | = | 880 | + | 1176 |
| 32 | t | = | 880 | + | 1176 |
| 32 | t | = | 2056 |
| t | = | 2056 | ÷ | 32 |
| = | 2056 | × | 1 32 |
| = | 257 | × | 1 4 |
| t | = | 257 4 |
| t | = | 64.25 |