1 20000 | x | × | 2 | + | 2519 5000 | x | − | 13881 25 | = | 0 |
| 方程左边 = | 1 10000 | x | + | 2519 5000 | x | − | 13881 25 |
| = | 5039 10000 | x | − | 13881 25 |
5039 10000 | x | − | 13881 25 | = | 0 |
5039 10000 | x | = | 0 | + | 13881 25 |
5039 10000 | x | = | 13881 25 |
| x | = | 13881 25 | ÷ | 5039 10000 |
| = | 13881 25 | × | 10000 5039 |
| = | 13881 | × | 400 5039 |
| x | = | 5552400 5039 |
| x | = | 1101.885295 |