| ( | t | − | 5 | ) | ÷ | ( | t | − | 3 | ) | = | ( | t | − | 3 | ) | ÷ | ( | t | + | 3 | ) | + | 1 | ÷ | ( | t | − | 3 | ) |
| 方程两边同时乘以: | ( | t | − | 3 | ) | , | ( | t | + | 3 | ) |
| ( | t | − | 5 | ) | ( | t | + | 3 | ) | = | ( | t | − | 3 | ) | ( | t | − | 3 | ) | + | 1 | ( | t | + | 3 | ) |
| t | ( | t | + | 3 | ) | − | 5 | ( | t | + | 3 | ) | = | ( | t | − | 3 | ) | ( | t | − | 3 | ) | + | 1 | ( | t | + | 3 | ) |
| t | ( | t | + | 3 | ) | − | 5 | ( | t | + | 3 | ) | = | t | ( | t | − | 3 | ) | − | 3 | ( | t | − | 3 | ) | + | 1 | ( | t | + | 3 | ) |
| t | t | + | t | × | 3 | − | 5 | ( | t | + | 3 | ) | = | t | ( | t | − | 3 | ) | − | 3 | ( | t | − | 3 | ) | + | 1 | ( | t | + | 3 | ) |
| t | t | + | t | × | 3 | − | 5 | ( | t | + | 3 | ) | = | t | t | − | t | × | 3 | − | 3 | ( | t | − | 3 | ) | + | 1 | ( | t | + | 3 | ) |
| t | t | + | 3 | t | − | 5 | t | − | 5 | × | 3 | = | t | t | − | 3 | t | − | 3 | ( | t | − | 3 | ) | + | 1 | ( | t | + | 3 | ) |
| t | t | + | 3 | t | − | 5 | t | − | 5 | × | 3 | = | t | t | − | 3 | t | − | 3 | t | + | 3 | × | 3 | + | 1 | ( | t | + | 3 | ) |
| t | t | + | 3 | t | − | 5 | t | − | 15 | = | t | t | − | 3 | t | − | 3 | t | + | 9 | + | 1 | ( | t | + | 3 | ) |
| t | t | − | 2 | t | − | 15 | = | t | t | − | 6 | t | + | 9 | + | 1 | ( | t | + | 3 | ) |
| t | t | − | 2 | t | − | 15 | = | t | t | − | 6 | t | + | 9 | + | 1 | t | + | 1 | × | 3 |
| t | t | − | 2 | t | − | 15 | = | t | t | − | 6 | t | + | 9 | + | 1 | t | + | 3 |
| t | t | − | 2 | t | − | 15 | = | t | t | − | 5 | t | + | 12 |