| ( | x | − | 2 | ) | ( | 5000 | − | 17 | − | x | ) | = | 0 |
| 方程左边 = | x | ( | 5000 | − | 17 | − | x | ) | − | 2 | ( | 5000 | − | 17 | − | x | ) |
| = | x | × | 5000 | − | x | × | 17 | − | x | x | − | 2 | ( | 5000 | − | 17 | − | x | ) |
| = | 4983 | x | − | x | x | − | 2 | ( | 5000 | − | 17 | − | x | ) |
| = | 4983 | x | − | x | x | − | 2 | × | 5000 | + | 2 | × | 17 | + | 2 | x |
| = | 4983 | x | − | x | x | − | 10000 | + | 34 | + | 2 | x |
| = | 4985 | x | − | x | x | − | 9966 |
| 4985 | x | − | x | x | − | 9966 | = | 0 |