1931 625 | x | × | 2 | − | 21993 5000 | x | + | 1931 625 | = | 0 |
| 方程左边 = | 3862 625 | x | − | 21993 5000 | x | + | 1931 625 |
| = | 8903 5000 | x | + | 1931 625 |
8903 5000 | x | + | 1931 625 | = | 0 |
8903 5000 | x | = | 0 | − | 1931 625 |
8903 5000 | x | = | - | 1931 625 |
| x | = | - | 1931 625 | ÷ | 8903 5000 |
| = | - | 1931 625 | × | 5000 8903 |
| = | - | 1931 | × | 8 8903 |
| x | = | - | 15448 8903 |
| x | = | - 1.735145 |