| 3 | ÷ | 5 | × | ( | 10 | − | t | ) | ( | 10 | − | 2 | t | ) | = | t | ( | 10 | − | t | ) |
| 方程左边 = | 3 5 | ( | 10 | − | t | ) | ( | 10 | − | 2 | t | ) |
3 5 | ( | 10 | − | t | ) | ( | 10 | − | 2 | t | ) | = | t | ( | 10 | − | t | ) |
| 方程左边 = | 3 5 | × | 10 | ( | 10 | − | 2 | t | ) | − | 3 5 | t | ( | 10 | − | 2 | t | ) |
| = | 6 | ( | 10 | − | 2 | t | ) | − | 3 5 | t | ( | 10 | − | 2 | t | ) |
| = | 6 | × | 10 | − | 6 | × | 2 | t | − | 3 5 | t | ( | 10 | − | 2 | t | ) |
| = | 60 | − | 12 | t | − | 3 5 | t | ( | 10 | − | 2 | t | ) |
| = | 60 | − | 12 | t | − | 3 5 | t | × | 10 | + | 3 5 | t | × | 2 | t |
| = | 60 | − | 12 | t | − | 6 | t | + | 6 5 | t | t |
| = | 60 | − | 18 | t | + | 6 5 | t | t |
| 60 | − | 18 | t | + | 6 5 | t | t | = | t | ( | 10 | − | t | ) |
| 方程右边 = | t | × | 10 | − | t | t |
| 60 | − | 18 | t | + | 6 5 | t | t | = | 10 | t | − | t | t |
| t1= | 30 11 |
| t2=10 |