| ( | 3569 | + | 500 | x | ) | ÷ | ( | 1 | + | x | ) | = | 2500 |
| 方程两边同时乘以: | ( | 1 | + | x | ) |
| ( | 3569 | + | 500 | x | ) | = | 2500 | ( | 1 | + | x | ) |
| 3569 | + | 500 | x | = | 2500 | ( | 1 | + | x | ) |
| 3569 | + | 500 | x | = | 2500 | × | 1 | + | 2500 | x |
| 3569 | + | 500 | x | = | 2500 | + | 2500 | x |
| 500 | x | − | 2500 | x | = | 2500 | − | 3569 |
| - | 2000 | x | = | 2500 | − | 3569 |
| - | 2000 | x | = | - | 1069 |
| 1069 | = | 2000 | x |
| 2000 | x | = | 1069 |
| x | = | 1069 | ÷ | 2000 |
| = | 1069 | × | 1 2000 |
| x | = | 1069 2000 |
| x | = | 0.5345 |