| ( | 20 | + | x | ) | ÷ | ( | 26 | + | x | ) | = | 23 25 |
| 方程两边同时乘以: | ( | 26 | + | x | ) |
| ( | 20 | + | x | ) | = | 23 25 | ( | 26 | + | x | ) |
| 20 | + | x | = | 23 25 | ( | 26 | + | x | ) |
| 20 | + | x | = | 23 25 | × | 26 | + | 23 25 | x |
| 20 | + | x | = | 598 25 | + | 23 25 | x |
| x | − | 23 25 | x | = | 598 25 | − | 20 |
2 25 | x | = | 598 25 | − | 20 |
2 25 | x | = | 98 25 |
| x | = | 98 25 | ÷ | 2 25 |
| = | 98 25 | × | 25 2 |
| = | 49 | × | 1 |
| x | = | 49 |