( | 160 | + | x | ) | ( | 50 | − | 1 10 | x | ) | = | 9450 |
方程左边 = | 160 | ( | 50 | − | 1 10 | x | ) | + | x | ( | 50 | − | 1 10 | x | ) |
= | 160 | × | 50 | − | 160 | × | 1 10 | x | + | x | ( | 50 | − | 1 10 | x | ) |
= | 8000 | − | 16 | x | + | x | ( | 50 | − | 1 10 | x | ) |
= | 8000 | − | 16 | x | + | x | × | 50 | − | x | × | 1 10 | x |
= | 8000 | + | 34 | x | − | x | × | 1 10 | x |
8000 | + | 34 | x | − | x | × | 1 10 | x | = | 9450 |