( | 10000 | x | + | 5000 | ) | ( | 97 100 | + | x | ) | = | 6985 |
方程左边 = | 10000 | x | ( | 97 100 | + | x | ) | + | 5000 | ( | 97 100 | + | x | ) |
= | 10000 | x | × | 97 100 | + | 10000 | x | x | + | 5000 | ( | 97 100 | + | x | ) |
= | 9700 | x | + | 10000 | x | x | + | 5000 | ( | 97 100 | + | x | ) |
= | 9700 | x | + | 10000 | x | x | + | 5000 | × | 97 100 | + | 5000 | x |
= | 9700 | x | + | 10000 | x | x | + | 4850 | + | 5000 | x |
= | 14700 | x | + | 10000 | x | x | + | 4850 |
14700 | x | + | 10000 | x | x | + | 4850 | = | 6985 |