| ( | 58 | − | 42 | ) | ÷ | ( | 42 | − | 26 | ) | = | ( | 80 | − | t | ) | ÷ | ( | t | − | 56 | ) |
| 方程两边同时乘以: | ( | 42 | − | 26 | ) | , | ( | t | − | 56 | ) |
| ( | 58 | − | 42 | ) | ( | t | − | 56 | ) | = | ( | 80 | − | t | ) | ( | 42 | − | 26 | ) |
| 58 | ( | t | − | 56 | ) | − | 42 | ( | t | − | 56 | ) | = | ( | 80 | − | t | ) | ( | 42 | − | 26 | ) |
| 58 | ( | t | − | 56 | ) | − | 42 | ( | t | − | 56 | ) | = | 80 | ( | 42 | − | 26 | ) | − | t | ( | 42 | − | 26 | ) |
| 58 | t | − | 58 | × | 56 | − | 42 | ( | t | − | 56 | ) | = | 80 | ( | 42 | − | 26 | ) | − | t | ( | 42 | − | 26 | ) |
| 58 | t | − | 58 | × | 56 | − | 42 | ( | t | − | 56 | ) | = | 80 | × | 42 | − | 80 | × | 26 | − | t | ( | 42 | − | 26 | ) |
| 58 | t | − | 3248 | − | 42 | ( | t | − | 56 | ) | = | 3360 | − | 2080 | − | t | ( | 42 | − | 26 | ) |
| 58 | t | − | 3248 | − | 42 | ( | t | − | 56 | ) | = | 1280 | − | t | ( | 42 | − | 26 | ) |
| 58 | t | − | 3248 | − | 42 | t | + | 42 | × | 56 | = | 1280 | − | t | ( | 42 | − | 26 | ) |
| 58 | t | − | 3248 | − | 42 | t | + | 42 | × | 56 | = | 1280 | − | t | × | 42 | + | t | × | 26 |
| 58 | t | − | 3248 | − | 42 | t | + | 2352 | = | 1280 | − | t | × | 42 | + | t | × | 26 |
| 16 | t | − | 896 | = | 1280 | − | 16 | t |
| 16 | t | + | 16 | t | = | 1280 | + | 896 |
| 32 | t | = | 1280 | + | 896 |
| 32 | t | = | 2176 |
| t | = | 2176 | ÷ | 32 |
| = | 2176 | × | 1 32 |
| = | 68 | × | 1 |
| t | = | 68 |