1 2 | × | 7685 | x | x | = | 20 | ÷ | 3 | × | 3242 | ( | 2823 2 | − | x | ) |
| 方程左边 = | 7685 2 | x | x |
7685 2 | x | x | = | 20 | ÷ | 3 | × | 3242 | ( | 2823 2 | − | x | ) |
| 方程右边 = | 64840 3 | ( | 2823 2 | − | x | ) |
7685 2 | x | x | = | 64840 3 | ( | 2823 2 | − | x | ) |
| 方程右边 = | 64840 3 | × | 2823 2 | − | 64840 3 | x |
| = | 30507220 | − | 64840 3 | x |
7685 2 | x | x | = | 30507220 | − | 64840 3 | x |