| ( | 33 | − | 30 | ) | ÷ | ( | 30 | − | 28 | ) | = | ( | 55 | − | t | ) | ÷ | ( | t | − | 41 | ) |
| 方程两边同时乘以: | ( | 30 | − | 28 | ) | , | ( | t | − | 41 | ) |
| ( | 33 | − | 30 | ) | ( | t | − | 41 | ) | = | ( | 55 | − | t | ) | ( | 30 | − | 28 | ) |
| 33 | ( | t | − | 41 | ) | − | 30 | ( | t | − | 41 | ) | = | ( | 55 | − | t | ) | ( | 30 | − | 28 | ) |
| 33 | ( | t | − | 41 | ) | − | 30 | ( | t | − | 41 | ) | = | 55 | ( | 30 | − | 28 | ) | − | t | ( | 30 | − | 28 | ) |
| 33 | t | − | 33 | × | 41 | − | 30 | ( | t | − | 41 | ) | = | 55 | ( | 30 | − | 28 | ) | − | t | ( | 30 | − | 28 | ) |
| 33 | t | − | 33 | × | 41 | − | 30 | ( | t | − | 41 | ) | = | 55 | × | 30 | − | 55 | × | 28 | − | t | ( | 30 | − | 28 | ) |
| 33 | t | − | 1353 | − | 30 | ( | t | − | 41 | ) | = | 1650 | − | 1540 | − | t | ( | 30 | − | 28 | ) |
| 33 | t | − | 1353 | − | 30 | ( | t | − | 41 | ) | = | 110 | − | t | ( | 30 | − | 28 | ) |
| 33 | t | − | 1353 | − | 30 | t | + | 30 | × | 41 | = | 110 | − | t | ( | 30 | − | 28 | ) |
| 33 | t | − | 1353 | − | 30 | t | + | 30 | × | 41 | = | 110 | − | t | × | 30 | + | t | × | 28 |
| 33 | t | − | 1353 | − | 30 | t | + | 1230 | = | 110 | − | t | × | 30 | + | t | × | 28 |
| 3 | t | − | 123 | = | 110 | − | 2 | t |
| 3 | t | + | 2 | t | = | 110 | + | 123 |
| 5 | t | = | 110 | + | 123 |
| 5 | t | = | 233 |
| t | = | 233 | ÷ | 5 |
| = | 233 | × | 1 5 |
| t | = | 233 5 |
| t | = | 46.6 |