( | 1000 | x | + | 30000 | ) | ( | x | + | 10 | ) | = | ( | 1000 | x | - | 90000 | ) | ( | x | + | 100 | ) |
方程左边 = | 1000 | x | ( | x | + | 10 | ) | + | 30000 | ( | x | + | 10 | ) |
= | 1000 | x | x | + | 1000 | x | × | 10 | + | 30000 | ( | x | + | 10 | ) |
= | 1000 | x | x | + | 10000 | x | + | 30000 | ( | x | + | 10 | ) |
= | 1000 | x | x | + | 10000 | x | + | 30000 | x | + | 30000 | × | 10 |
= | 1000 | x | x | + | 10000 | x | + | 30000 | x | + | 300000 |
= | 1000 | x | x | + | 40000 | x | + | 300000 |
1000 | x | x | + | 40000 | x | + | 300000 | = | ( | 1000 | x | - | 90000 | ) | ( | x | + | 100 | ) |
方程右边 = | 1000 | x | ( | x | + | 100 | ) | - | 90000 | ( | x | + | 100 | ) |
= | 1000 | x | x | + | 1000 | x | × | 100 | - | 90000 | ( | x | + | 100 | ) |
= | 1000 | x | x | + | 100000 | x | - | 90000 | ( | x | + | 100 | ) |
= | 1000 | x | x | + | 100000 | x | - | 90000 | x | - | 90000 | × | 100 |
= | 1000 | x | x | + | 100000 | x | - | 90000 | x | - | 9000000 |
= | 1000 | x | x | + | 10000 | x | - | 9000000 |
1000 | x | x | + | 40000 | x | + | 300000 | = | 1000 | x | x | + | 10000 | x | - | 9000000 |