300 | ( | 1 | + | x | ) | ( | 1 | + | x | ) | = | 1092 |
方程左边 = | 300 | × | 1 | ( | 1 | + | x | ) | + | 300 | x | ( | 1 | + | x | ) |
= | 300 | ( | 1 | + | x | ) | + | 300 | x | ( | 1 | + | x | ) |
= | 300 | × | 1 | + | 300 | x | + | 300 | x | ( | 1 | + | x | ) |
= | 300 | + | 300 | x | + | 300 | x | ( | 1 | + | x | ) |
= | 300 | + | 300 | x | + | 300 | x | × | 1 | + | 300 | x | x |
= | 300 | + | 300 | x | + | 300 | x | + | 300 | x | x |
= | 300 | + | 600 | x | + | 300 | x | x |
300 | + | 600 | x | + | 300 | x | x | = | 1092 |