(50-40+X)(500-10X)=8000怎么算
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![(50-40+X)(500-10X)=8000怎么算](/uploads/image/z/589443-51-3.jpg?t=%EF%BC%8850-40%2BX%EF%BC%89%EF%BC%88500-10X%EF%BC%89%3D8000%E6%80%8E%E4%B9%88%E7%AE%97)
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(50-40+X)(500-10X)=8000怎么算
(50-40+X)(500-10X)=8000怎么算
(50-40+X)(500-10X)=8000怎么算
(50-40+X)(500-10X)=8000
-10 (-30 + x) (-10 + x) == 0
x=30
x=10
(50-40+X)(500-10X)=8000 10