14000 | = | ( | 60 | − | x | ÷ | 10 | ) | ( | 200 | + | x | ) | − | 20 | ( | 60 | − | x | ÷ | 10 | ) |
方程右边 = | 60 | ( | 200 | + | x | ) | − | x | ÷ | 10 | × | ( | 200 | + | x | ) | − | 20 | ( | 60 | − | x | ÷ | 10 | ) |
= | 60 | × | 200 | + | 60 | x | − | x | × | 1 10 | ( | 200 | + | x | ) | − | 20 | ( | 60 | − | x | ÷ | 10 | ) |
= | 12000 | + | 60 | x | − | x | × | 1 10 | ( | 200 | + | x | ) | − | 20 | ( | 60 | − | x | ÷ | 10 | ) |
= | 12000 | + | 60 | x | − | x | × | 1 10 | × | 200 | − | x | × | 1 10 | x | − | 20 | ( | 60 | − | x | ÷ | 10 | ) |
= | 12000 | + | 60 | x | − | x | × | 20 | − | x | × | 1 10 | x | − | 20 | ( | 60 | − | x | ÷ | 10 | ) |
= | 12000 | + | 40 | x | − | x | × | 1 10 | x | − | 20 | ( | 60 | − | x | ÷ | 10 | ) |
= | 12000 | + | 40 | x | − | x | × | 1 10 | x | − | 20 | × | 60 | + | 20 | x | ÷ | 10 |
= | 12000 | + | 40 | x | − | x | × | 1 10 | x | − | 1200 | + | 2 | x |
= | 10800 | + | 42 | x | − | x | × | 1 10 | x |
14000 | = | 10800 | + | 42 | x | − | x | × | 1 10 | x |