| ( | 1 | − | 5513 1000 | x | ) | ( | 1 | − | 1759 250 | x | ) | = | 1 | − | 459 50 | x |
| 方程左边 = | 1 | ( | 1 | − | 1759 250 | x | ) | − | 5513 1000 | x | ( | 1 | − | 1759 250 | x | ) |
| = | 1 | × | 1 | − | 1 | × | 1759 250 | x | − | 5513 1000 | x | ( | 1 | − | 1759 250 | x | ) |
| = | 1 | − | 1759 250 | x | − | 5513 1000 | x | ( | 1 | − | 1759 250 | x | ) |
| = | 1 | − | 1759 250 | x | − | 5513 1000 | x | × | 1 | + | 5513 1000 | x | × | 1759 250 | x |
| = | 1 | − | 1759 250 | x | − | 5513 1000 | x | + | 9697367 250000 | x | x |
| = | 1 | − | 12549 1000 | x | + | 9697367 250000 | x | x |
| 1 | − | 12549 1000 | x | + | 9697367 250000 | x | x | = | 1 | − | 459 50 | x |