| 1 | ÷ | ( | x | + | 2000 | ) | − | 1 | ÷ | x | = | 1 | ÷ | ( | x | + | 1500 | ) | − | 1 | ÷ | ( | x | − | 500 | ) |
| 方程两边同时乘以: | ( | x | + | 2000 | ) | , | ( | x | + | 1500 | ) |
| 1 | ( | x | + | 1500 | ) | − | 1 | ÷ | x | × | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) | = | 1 | ( | x | + | 2000 | ) | − | 1 | ÷ | ( | x | − | 500 | ) | × | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) |
| 1 | x | + | 1 | × | 1500 | − | 1 | ÷ | x | × | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) | = | 1 | ( | x | + | 2000 | ) | − | 1 | ÷ | ( | x | − | 500 | ) | × | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) |
| 1 | x | + | 1 | × | 1500 | − | 1 | ÷ | x | × | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) | = | 1 | x | + | 1 | × | 2000 | − | 1 | ÷ | ( | x | − | 500 | ) | × | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) |
| 1 | x | + | 1500 | − | 1 | ÷ | x | × | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) | = | 1 | x | + | 2000 | − | 1 | ÷ | ( | x | − | 500 | ) | × | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) |
| 方程两边同时乘以: | x | , | ( | x | − | 500 | ) |
| 1 | x | x | ( | x | − | 500 | ) | + | 1500 | x | ( | x | − | 500 | ) | − | 1 | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) | ( | x | − | 500 | ) | = | 1 | x | x | ( | x | − | 500 | ) | + | 2000 | x | ( | x | − | 500 | ) | − | 1 | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) | x |
| 1 | x | x | x | − | 1 | x | x | × | 500 | + | 1500 | x | ( | x | − | 500 | ) | − | 1 | = | 1 | x | x | ( | x | − | 500 | ) | + | 2000 | x | ( | x | − | 500 | ) | − | 1 | ( | x | + | 2000 | ) | ( | x | + | 1500 | ) | x |
| 1 | x | x | x | − | 1 | x | x | × | 500 | + | 1500 | x | ( | x | − | 500 | ) | − | 1 | = | 1 | x | x | x | − | 1 | x | x | × | 500 | + | 2000 | x | ( | x | − | 500 | ) | − | 1 |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | ( | x | − | 500 | ) | − | 1 | ( | x | + | 2000 | ) | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | ( | x | − | 500 | ) | − | 1 | ( | x | + | 2000 | ) |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 1500 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | ( | x | − | 500 | ) | − | 1 | ( | x | + | 2000 | ) |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 1500 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 2000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 1000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 1000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 1000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 1000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 1000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 1000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 1000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 1000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 1000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 1000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 4000000 | x |
| 1 | x | x | x | − | 500 | x | x | + | 1500 | x | x | − | 750000 | x | = | 1 | x | x | x | − | 500 | x | x | + | 2000 | x | x | − | 4000000 | x |