| ( | x | + | 250 | ) | ÷ | 25 | = | ( | x | + | 210 | ) | ÷ | 23 |
| 方程左边 = | x | × | 1 25 | + | 250 | × | 1 25 |
| = | x | × | 1 25 | + | 10 |
1 25 | x | + | 10 | = | ( | x | + | 210 | ) | ÷ | 23 |
| 方程右边 = | x | × | 1 23 | + | 210 | × | 1 23 |
| = | x | × | 1 23 | + | 210 23 |
1 25 | x | + | 10 | = | 1 23 | x | + | 210 23 |
1 25 | x | − | 1 23 | x | = | 210 23 | − | 10 |
| - | 2 575 | x | = | 210 23 | − | 10 |
| - | 2 575 | x | = | - | 20 23 |
20 23 | = | 2 575 | x |
2 575 | x | = | 20 23 |
| x | = | 20 23 | ÷ | 2 575 |
| = | 20 23 | × | 575 2 |
| = | 10 | × | 25 |
| x | = | 250 |