| ( | 58 | − | 49 | ) | ÷ | ( | 49 | − | 26 | ) | = | ( | 80 | − | t | ) | ÷ | ( | t | − | 56 | ) |
| 方程两边同时乘以: | ( | 49 | − | 26 | ) | , | ( | t | − | 56 | ) |
| ( | 58 | − | 49 | ) | ( | t | − | 56 | ) | = | ( | 80 | − | t | ) | ( | 49 | − | 26 | ) |
| 58 | ( | t | − | 56 | ) | − | 49 | ( | t | − | 56 | ) | = | ( | 80 | − | t | ) | ( | 49 | − | 26 | ) |
| 58 | ( | t | − | 56 | ) | − | 49 | ( | t | − | 56 | ) | = | 80 | ( | 49 | − | 26 | ) | − | t | ( | 49 | − | 26 | ) |
| 58 | t | − | 58 | × | 56 | − | 49 | ( | t | − | 56 | ) | = | 80 | ( | 49 | − | 26 | ) | − | t | ( | 49 | − | 26 | ) |
| 58 | t | − | 58 | × | 56 | − | 49 | ( | t | − | 56 | ) | = | 80 | × | 49 | − | 80 | × | 26 | − | t | ( | 49 | − | 26 | ) |
| 58 | t | − | 3248 | − | 49 | ( | t | − | 56 | ) | = | 3920 | − | 2080 | − | t | ( | 49 | − | 26 | ) |
| 58 | t | − | 3248 | − | 49 | ( | t | − | 56 | ) | = | 1840 | − | t | ( | 49 | − | 26 | ) |
| 58 | t | − | 3248 | − | 49 | t | + | 49 | × | 56 | = | 1840 | − | t | ( | 49 | − | 26 | ) |
| 58 | t | − | 3248 | − | 49 | t | + | 49 | × | 56 | = | 1840 | − | t | × | 49 | + | t | × | 26 |
| 58 | t | − | 3248 | − | 49 | t | + | 2744 | = | 1840 | − | t | × | 49 | + | t | × | 26 |
| 9 | t | − | 504 | = | 1840 | − | 23 | t |
| 9 | t | + | 23 | t | = | 1840 | + | 504 |
| 32 | t | = | 1840 | + | 504 |
| 32 | t | = | 2344 |
| t | = | 2344 | ÷ | 32 |
| = | 2344 | × | 1 32 |
| = | 293 | × | 1 4 |
| t | = | 293 4 |
| t | = | 73.25 |