如果2x=3y,x≠0,y≠0,求(5x-2y)/(x+3y)的ŀ
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已知2x=3y,xy≠0,求(5x-2y)/(x+3y)
解:由已知 2x=3y,x/y=3/2
(5x-2y)/(x+3y)
=(5-2y/x)/(1+3y/x)
=(5-2×3/2)/(1+3×3/2)
=2÷11/2
=2×2/11
=4/11
解:由已知 2x=3y,x/y=3/2
(5x-2y)/(x+3y)
=(5-2y/x)/(1+3y/x)
=(5-2×3/2)/(1+3×3/2)
=2÷11/2
=2×2/11
=4/11
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