已知:x:y:z=2:3:4,求x+y+z分之3x+2y-z的值
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已知:x:y:z=2:3:4,求x+y+z分之3x+2y-z的值
解解答
解解答
![已知:x:y:z=2:3:4,求x+y+z分之3x+2y-z的值](/uploads/image/z/17302921-25-1.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%9Ax%3Ay%3Az%3D2%3A3%3A4%2C%E6%B1%82x%2By%2Bz%E5%88%86%E4%B9%8B3x%2B2y-z%E7%9A%84%E5%80%BC)
设X=2T,Y=3T,Z=4T,
则(3X+2Y-Z)/(X+Y+Z)
=(6T+6T-4T)/(2T+3T+4T )
=8T/9T
=8/9
则(3X+2Y-Z)/(X+Y+Z)
=(6T+6T-4T)/(2T+3T+4T )
=8T/9T
=8/9
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