| ( | x | − | 50 | ) | ( | 1 | − | 25 100 | ) | ÷ | 100 | = | ( | x | − | 0 | ) | ( | 1 | − | 25 100 | ) | ÷ | 150 |
| 方程左边 = | x | ( | 1 | − | 25 100 | ) | × | 1 100 | − | 50 | ( | 1 | − | 25 100 | ) | × | 1 100 |
| = | x | ( | 1 | − | 25 100 | ) | × | 1 100 | − | 1 2 | ( | 1 | − | 25 100 | ) |
| = | x | × | 1 | × | 1 100 | − | x | × | 25 100 | × | 1 100 | − | 1 2 | ( | 1 | − | 25 100 | ) |
| = | x | × | 1 100 | − | x | × | 1 400 | − | 1 2 | ( | 1 | − | 25 100 | ) |
| = | 3 400 | x | − | 1 2 | ( | 1 | − | 25 100 | ) |
| = | 3 400 | x | − | 1 2 | × | 1 | + | 1 2 | × | 25 100 |
| = | 3 400 | x | − | 1 2 | + | 1 8 |
| = | 3 400 | x | − | 3 8 |
3 400 | x | − | 3 8 | = | ( | x | − | 0 | ) | ( | 1 | − | 25 100 | ) | ÷ | 150 |
| 方程右边 = | x | ( | 1 | − | 25 100 | ) | × | 1 150 | − | 0 | ( | 1 | − | 25 100 | ) | × | 1 150 |
| = | x | ( | 1 | − | 25 100 | ) | × | 1 150 | − | 0 | ( | 1 | − | 25 100 | ) |
| = | x | × | 1 | × | 1 150 | − | x | × | 25 100 | × | 1 150 | − | 0 | ( | 1 | − | 25 100 | ) |
| = | x | × | 1 150 | − | x | × | 1 600 | − | 0 | ( | 1 | − | 25 100 | ) |
| = | 1 200 | x | − | 0 | ( | 1 | − | 25 100 | ) |
| = | 1 200 | x | − | 0 | × | 1 | + | 0 | × | 25 100 |
| = | 1 200 | x | − | 0 | + | 0 |
| = | 1 200 | x | − | 0 |
3 400 | x | − | 3 8 | = | 1 200 | x | − | 0 |
3 400 | x | − | 1 200 | x | = | 3 8 |
1 400 | x | = | 3 8 |
| x | = | 3 8 | ÷ | 1 400 |
| = | 3 8 | × | 400 |
| = | 3 | × | 50 |
| x | = | 150 |