| ( | 232 | + | x | ) | ÷ | ( | 330 | + | x | ) | = | 7069 10000 |
| 方程两边同时乘以: | ( | 330 | + | x | ) |
| ( | 232 | + | x | ) | = | 7069 10000 | ( | 330 | + | x | ) |
| 232 | + | x | = | 7069 10000 | ( | 330 | + | x | ) |
| 232 | + | x | = | 7069 10000 | × | 330 | + | 7069 10000 | x |
| 232 | + | x | = | 233277 1000 | + | 7069 10000 | x |
| x | − | 7069 10000 | x | = | 233277 1000 | − | 232 |
2931 10000 | x | = | 233277 1000 | − | 232 |
2931 10000 | x | = | 1277 1000 |
| x | = | 1277 1000 | ÷ | 2931 10000 |
| = | 1277 1000 | × | 10000 2931 |
| = | 1277 | × | 10 2931 |
| x | = | 12770 2931 |
| x | = | 4.356875 |