已知:x:y:z=2:3:5,求x+y/x-2y+3z的值
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已知:x:y:z=2:3:5,求x+y/x-2y+3z的值
已知:x:y:z=2:3:5,求x+y/x-2y+3z的值
已知:x:y:z=2:3:5,求x+y/x-2y+3z的值
x:y:z=2:3:5
x=2k
y=3k
z=5k
x+y/x-2y+3z
=5k/11k
=5/11
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