| 33800 | = | ( | 15000 | ( | 1 5 | × | 3 2 | × | 9 10 | + | t | × | 4 5 | × | 2 5 | ) | ) |
| 方程右边 = | 15000 | ( | 1 5 | × | 3 2 | × | 9 10 | + | t | × | 4 5 | × | 2 5 | ) |
| = | 15000 | × | 1 5 | × | 3 2 | × | 9 10 | + | 15000 | t | × | 4 5 | × | 2 5 |
| = | 4050 | + | 4800 | t |
| 33800 | = | 4050 | + | 4800 | t |
| - | 4800 | t | = | 4050 | − | 33800 |
| - | 4800 | t | = | - | 29750 |
| 29750 | = | 4800 | t |
| 4800 | t | = | 29750 |
| t | = | 29750 | ÷ | 4800 |
| = | 29750 | × | 1 4800 |
| = | 595 | × | 1 96 |
| t | = | 595 96 |
| t | = | 6.197917 |