| ( | 113399 5000 | − | x | ) | ÷ | 2 | = | 17 500 |
| 方程左边 = | 113399 5000 | × | 1 2 | − | x | × | 1 2 |
| = | 113399 10000 | − | x | × | 1 2 |
113399 10000 | − | 1 2 | x | = | 17 500 |
| - | 1 2 | x | = | 17 500 | − | 113399 10000 |
| - | 1 2 | x | = | - | 113059 10000 |
113059 10000 | = | 1 2 | x |
1 2 | x | = | 113059 10000 |
| x | = | 113059 10000 | ÷ | 1 2 |
| = | 113059 10000 | × | 2 |
| = | 113059 5000 | × | 1 |
| x | = | 113059 5000 |
| x | = | 22.6118 |