1 2 | = | 15 100 | ÷ | ( | ( | x | − | 25 | ) | ÷ | 25 | × | 100 100 | ) |
| 方程两边同时乘以: | ( | ( | x | − | 25 | ) | ÷ | 25 | × | 100 100 | ) |
1 2 | ( | ( | x | − | 25 | ) | ÷ | 25 | × | 100 100 | ) | = | 15 100 |
1 2 | ( | x | − | 25 | ) | ÷ | 25 | × | 100 100 | = | 15 100 |
1 50 | ( | x | − | 25 | ) | = | 15 100 |
1 50 | x | − | 1 50 | × | 25 | = | 15 100 |
1 50 | x | − | 1 2 | = | 15 100 |
1 50 | x | = | 15 100 | + | 1 2 |
1 50 | x | = | 13 20 |
| x | = | 13 20 | ÷ | 1 50 |
| = | 13 20 | × | 50 |
| = | 13 2 | × | 5 |
| x | = | 65 2 |
| x | = | 32.5 |