| ( | 58 | − | 28 | ) | ÷ | ( | 28 | − | 26 | ) | = | ( | 80 | − | t | ) | ÷ | ( | t | − | 56 | ) |
| 方程两边同时乘以: | ( | 28 | − | 26 | ) | , | ( | t | − | 56 | ) |
| ( | 58 | − | 28 | ) | ( | t | − | 56 | ) | = | ( | 80 | − | t | ) | ( | 28 | − | 26 | ) |
| 58 | ( | t | − | 56 | ) | − | 28 | ( | t | − | 56 | ) | = | ( | 80 | − | t | ) | ( | 28 | − | 26 | ) |
| 58 | ( | t | − | 56 | ) | − | 28 | ( | t | − | 56 | ) | = | 80 | ( | 28 | − | 26 | ) | − | t | ( | 28 | − | 26 | ) |
| 58 | t | − | 58 | × | 56 | − | 28 | ( | t | − | 56 | ) | = | 80 | ( | 28 | − | 26 | ) | − | t | ( | 28 | − | 26 | ) |
| 58 | t | − | 58 | × | 56 | − | 28 | ( | t | − | 56 | ) | = | 80 | × | 28 | − | 80 | × | 26 | − | t | ( | 28 | − | 26 | ) |
| 58 | t | − | 3248 | − | 28 | ( | t | − | 56 | ) | = | 2240 | − | 2080 | − | t | ( | 28 | − | 26 | ) |
| 58 | t | − | 3248 | − | 28 | ( | t | − | 56 | ) | = | 160 | − | t | ( | 28 | − | 26 | ) |
| 58 | t | − | 3248 | − | 28 | t | + | 28 | × | 56 | = | 160 | − | t | ( | 28 | − | 26 | ) |
| 58 | t | − | 3248 | − | 28 | t | + | 28 | × | 56 | = | 160 | − | t | × | 28 | + | t | × | 26 |
| 58 | t | − | 3248 | − | 28 | t | + | 1568 | = | 160 | − | t | × | 28 | + | t | × | 26 |
| 30 | t | − | 1680 | = | 160 | − | 2 | t |
| 30 | t | + | 2 | t | = | 160 | + | 1680 |
| 32 | t | = | 160 | + | 1680 |
| 32 | t | = | 1840 |
| t | = | 1840 | ÷ | 32 |
| = | 1840 | × | 1 32 |
| = | 115 | × | 1 2 |
| t | = | 115 2 |
| t | = | 57.5 |