( | 92 | − | 2 | x | ) | ( | 60 | − | x | ) | ÷ | 6 | = | 885 |
方程左边 = | 92 | ( | 60 | − | x | ) | × | 1 6 | − | 2 | x | ( | 60 | − | x | ) | × | 1 6 |
= | 46 3 | ( | 60 | − | x | ) | − | 1 3 | x | ( | 60 | − | x | ) |
= | 46 3 | × | 60 | − | 46 3 | x | − | 1 3 | x | ( | 60 | − | x | ) |
= | 920 | − | 46 3 | x | − | 1 3 | x | ( | 60 | − | x | ) |
= | 920 | − | 46 3 | x | − | 1 3 | x | × | 60 | + | 1 3 | x | x |
= | 920 | − | 46 3 | x | − | 20 | x | + | 1 3 | x | x |
= | 920 | − | 106 3 | x | + | 1 3 | x | x |
920 | − | 106 3 | x | + | 1 3 | x | x | = | 885 |