| ( | 500 | x | − | 5000 | ) | ÷ | ( | 500 | x | ) | = | 3 10 |
| 方程两边同时乘以: | ( | 500 | x | ) |
| ( | 500 | x | − | 5000 | ) | = | 3 10 | ( | 500 | x | ) |
| 500 | x | − | 5000 | = | 3 10 | ( | 500 | x | ) |
| 500 | x | − | 5000 | = | 3 10 | × | 500 | x |
| 500 | x | − | 5000 | = | 150 | x |
| 500 | x | − | 150 | x | = | 5000 |
| 350 | x | = | 5000 |
| x | = | 5000 | ÷ | 350 |
| = | 5000 | × | 1 350 |
| = | 100 | × | 1 7 |
| x | = | 100 7 |
| x | = | 14.285714 |