( | 6 | − | x | ) | ( | 10 | − | x | ) | = | 3 | ÷ | 5 | × | 4 | x | × | 4 | x |
方程左边 = | 6 | ( | 10 | − | x | ) | − | x | ( | 10 | − | x | ) |
= | 6 | × | 10 | − | 6 | x | − | x | ( | 10 | − | x | ) |
= | 60 | − | 6 | x | − | x | ( | 10 | − | x | ) |
= | 60 | − | 6 | x | − | x | × | 10 | + | x | x |
= | 60 | − | 16 | x | + | x | x |
60 | − | 16 | x | + | x | x | = | 3 | ÷ | 5 | × | 4 | x | × | 4 | x |
方程右边 = | 48 5 | x | x |
60 | − | 16 | x | + | x | x | = | 48 5 | x | x |