初三数学 己知x/3=y/4=m/5,求﹙x+y+m﹚/y,求﹙x+y﹚/﹙y+m﹚
5个回答
x/3=y/4得出y=4/3x
x/3=z/5得出z=5/3x
x+y+m=x+4/3x+5/3X=4x
x+y-m=2/3x
x+y+m/x+y-m=4x/2/3x=6
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