| ( | 181101 | + | X | ) | ÷ | ( | 486179 | + | X | ) | = | 2 5 |
| 方程两边同时乘以: | ( | 486179 | + | X | ) |
| ( | 181101 | + | X | ) | = | 2 5 | ( | 486179 | + | X | ) |
| 181101 | + | X | = | 2 5 | ( | 486179 | + | X | ) |
| 181101 | + | X | = | 2 5 | × | 486179 | + | 2 5 | X |
| 181101 | + | X | = | 972358 5 | + | 2 5 | X |
| X | − | 2 5 | X | = | 972358 5 | − | 181101 |
3 5 | X | = | 972358 5 | − | 181101 |
3 5 | X | = | 66853 5 |
| X | = | 66853 5 | ÷ | 3 5 |
| = | 66853 5 | × | 5 3 |
| = | 66853 | × | 1 3 |
| X | = | 66853 3 |
| X | = | 22284.333333 |