| x | ( | 1 | + | x | ) | × | 1663 200 | × | 7 | = | 281 2 | ( | 2 | − | x | ) |
| 方程左边 = | x | ( | 1 | + | x | ) | × | 11641 200 |
| x | ( | 1 | + | x | ) | × | 11641 200 | = | 281 2 | ( | 2 | − | x | ) |
| 方程左边 = | x | × | 1 | × | 11641 200 | + | x | x | × | 11641 200 |
| = | x | × | 11641 200 | + | x | x | × | 11641 200 |
11641 200 | x | + | x | x | × | 11641 200 | = | 281 2 | ( | 2 | − | x | ) |
| 方程右边 = | 281 2 | × | 2 | − | 281 2 | x |
| = | 281 | − | 281 2 | x |
11641 200 | x | + | x | x | × | 11641 200 | = | 281 | − | 281 2 | x |