| 4 | ÷ | ( | 1 | + | t | ) | × | ( | 1 | + | t | ) | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 |
| 方程两边同时乘以: | ( | 1 | + | t | ) |
| 4 | ( | 1 | + | t | ) | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 | ( | 1 | + | t | ) |
| 4 | × | 1 | ( | 1 | − | t | ) | ( | 1 | − | t | ) | + | 4 | t | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 | ( | 1 | + | t | ) |
| 4 | × | 1 | ( | 1 | − | t | ) | ( | 1 | − | t | ) | + | 4 | t | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 | × | 1 | + | 2 | t |
| 4 | ( | 1 | − | t | ) | ( | 1 | − | t | ) | + | 4 | t | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 | + | 2 | t |
| 4 | × | 1 | ( | 1 | − | t | ) | − | 4 | t | ( | 1 | − | t | ) | + | 4 | t | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 | + | 2 | t |
| 4 | ( | 1 | − | t | ) | − | 4 | t | ( | 1 | − | t | ) | + | 4 | t | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 | + | 2 | t |
| 4 | × | 1 | − | 4 | t | − | 4 | t | ( | 1 | − | t | ) | + | 4 | t | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 | + | 2 | t |
| 4 | − | 4 | t | − | 4 | t | ( | 1 | − | t | ) | + | 4 | t | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 | + | 2 | t |
| 4 | − | 4 | t | − | 4 | t | × | 1 | + | 4 | t | t | + | 4 | t | ( | 1 | − | t | ) | = | 2 | + | 2 | t |
| 4 | − | 4 | t | − | 4 | t | + | 4 | t | t | + | 4 | t | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 | + | 2 | t |
| 4 | − | 8 | t | + | 4 | t | t | + | 4 | t | ( | 1 | − | t | ) | ( | 1 | − | t | ) | = | 2 | + | 2 | t |
| 4 | − | 8 | t | + | 4 | t | t | + | 4 | t | × | 1 | ( | 1 | − | t | ) | − | 4 | t | = | 2 | + | 2 | t |
| 4 | − | 8 | t | + | 4 | t | t | + | 4 | t | ( | 1 | − | t | ) | − | 4 | t | t | = | 2 | + | 2 | t |
| 4 | − | 8 | t | + | 4 | t | t | + | 4 | t | × | 1 | − | 4 | t | t | = | 2 | + | 2 | t |
| 4 | − | 8 | t | + | 4 | t | t | + | 4 | t | − | 4 | t | t | − | 4 | = | 2 | + | 2 | t |
| 4 | − | 4 | t | + | 4 | t | t | − | 4 | t | t | − | 4 | t | t | = | 2 | + | 2 | t |
| 4 | − | 4 | t | + | 4 | t | t | − | 4 | t | t | − | 4 | t | t | = | 2 | + | 2 | t |
| 4 | − | 4 | t | + | 4 | t | t | − | 4 | t | t | − | 4 | t | t | = | 2 | + | 2 | t |