| ( | 232 | + | x | ) | ÷ | ( | 330 | + | x | ) | = | 71 100 |
| 方程两边同时乘以: | ( | 330 | + | x | ) |
| ( | 232 | + | x | ) | = | 71 100 | ( | 330 | + | x | ) |
| 232 | + | x | = | 71 100 | ( | 330 | + | x | ) |
| 232 | + | x | = | 71 100 | × | 330 | + | 71 100 | x |
| 232 | + | x | = | 2343 10 | + | 71 100 | x |
| x | − | 71 100 | x | = | 2343 10 | − | 232 |
29 100 | x | = | 2343 10 | − | 232 |
29 100 | x | = | 23 10 |
| x | = | 23 10 | ÷ | 29 100 |
| = | 23 10 | × | 100 29 |
| = | 23 | × | 10 29 |
| x | = | 230 29 |
| x | = | 7.931034 |