| ( | 5 | ( | 444 | + | X | ) | + | 250 | ) | ÷ | ( | 547 | + | X | ) | = | 23 5 |
| 方程两边同时乘以: | ( | 547 | + | X | ) |
| ( | 5 | ( | 444 | + | X | ) | + | 250 | ) | = | 23 5 | ( | 547 | + | X | ) |
| 5 | ( | 444 | + | X | ) | + | 250 | = | 23 5 | ( | 547 | + | X | ) |
| 5 | ( | 444 | + | X | ) | + | 250 | = | 23 5 | × | 547 | + | 23 5 | X |
| 5 | ( | 444 | + | X | ) | + | 250 | = | 12581 5 | + | 23 5 | X |
| 5 | × | 444 | + | 5 | X | + | 250 | = | 12581 5 | + | 23 5 | X |
| 2220 | + | 5 | X | + | 250 | = | 12581 5 | + | 23 5 | X |
| 2470 | + | 5 | X | = | 12581 5 | + | 23 5 | X |
| 5 | X | − | 23 5 | X | = | 12581 5 | − | 2470 |
2 5 | X | = | 12581 5 | − | 2470 |
2 5 | X | = | 231 5 |
| X | = | 231 5 | ÷ | 2 5 |
| = | 231 5 | × | 5 2 |
| = | 231 | × | 1 2 |
| X | = | 231 2 |
| X | = | 115.5 |