| ( | 25 | + | 2 | x | ) | ( | 25 | + | 2 | x | ) | ÷ | ( | 25 | − | x | ) | ÷ | ( | 25 | − | x | ) | = | 3 250 |
| 方程两边同时乘以: | ( | 25 | − | x | ) |
| ( | 25 | + | 2 | x | ) | ( | 25 | + | 2 | x | ) | ÷ | ( | 25 | − | x | ) | = | 3 250 | ( | 25 | − | x | ) |
| 25 | ( | 25 | + | 2 | x | ) | ÷ | ( | 25 | − | x | ) | + | 2 | x | ( | 25 | + | 2 | x | ) | ÷ | ( | 25 | − | x | ) | = | 3 250 | ( | 25 | − | x | ) |
| 25 | ( | 25 | + | 2 | x | ) | ÷ | ( | 25 | − | x | ) | + | 2 | x | ( | 25 | + | 2 | x | ) | ÷ | ( | 25 | − | x | ) | = | 3 250 | × | 25 | − | 3 250 | x |
| 25 | ( | 25 | + | 2 | x | ) | ÷ | ( | 25 | − | x | ) | + | 2 | x | ( | 25 | + | 2 | x | ) | ÷ | ( | 25 | − | x | ) | = | 3 10 | − | 3 250 | x |
| 方程两边同时乘以: | ( | 25 | − | x | ) |
| 25 | ( | 25 | + | 2 | x | ) | + | 2 | x | ( | 25 | + | 2 | x | ) | = | 3 10 | ( | 25 | − | x | ) | − | 3 250 | x | ( | 25 | − | x | ) |
| 25 | × | 25 | + | 25 | × | 2 | x | + | 2 | x | ( | 25 | + | 2 | x | ) | = | 3 10 | ( | 25 | − | x | ) | − | 3 250 | x | ( | 25 | − | x | ) |
| 25 | × | 25 | + | 25 | × | 2 | x | + | 2 | x | ( | 25 | + | 2 | x | ) | = | 3 10 | × | 25 | − | 3 10 | x | − | 3 250 | x | ( | 25 | − | x | ) |
| 625 | + | 50 | x | + | 2 | x | ( | 25 | + | 2 | x | ) | = | 15 2 | − | 3 10 | x | − | 3 250 | x | ( | 25 | − | x | ) |
| 625 | + | 50 | x | + | 2 | x | × | 25 | + | 2 | x | × | 2 | x | = | 15 2 | − | 3 10 | x | − | 3 250 | x | ( | 25 | − | x | ) |
| 625 | + | 50 | x | + | 2 | x | × | 25 | + | 2 | x | × | 2 | x | = | 15 2 | − | 3 10 | x | − | 3 250 | x | × | 25 | + | 3 250 | x | x |
| 625 | + | 50 | x | + | 50 | x | + | 4 | x | x | = | 15 2 | − | 3 10 | x | − | 3 10 | x | + | 3 250 | x | x |
| 625 | + | 100 | x | + | 4 | x | x | = | 15 2 | − | 3 5 | x | + | 3 250 | x | x |