| ( | 5 | ( | 450 | + | X | ) | + | 241 | ) | ÷ | ( | 547 | + | X | ) | = | 23 5 |
| 方程两边同时乘以: | ( | 547 | + | X | ) |
| ( | 5 | ( | 450 | + | X | ) | + | 241 | ) | = | 23 5 | ( | 547 | + | X | ) |
| 5 | ( | 450 | + | X | ) | + | 241 | = | 23 5 | ( | 547 | + | X | ) |
| 5 | ( | 450 | + | X | ) | + | 241 | = | 23 5 | × | 547 | + | 23 5 | X |
| 5 | ( | 450 | + | X | ) | + | 241 | = | 12581 5 | + | 23 5 | X |
| 5 | × | 450 | + | 5 | X | + | 241 | = | 12581 5 | + | 23 5 | X |
| 2250 | + | 5 | X | + | 241 | = | 12581 5 | + | 23 5 | X |
| 2491 | + | 5 | X | = | 12581 5 | + | 23 5 | X |
| 5 | X | − | 23 5 | X | = | 12581 5 | − | 2491 |
2 5 | X | = | 12581 5 | − | 2491 |
2 5 | X | = | 126 5 |
| X | = | 126 5 | ÷ | 2 5 |
| = | 126 5 | × | 5 2 |
| = | 63 | × | 1 |
| X | = | 63 |