若3x=7y,则y比x= ,x:(x+y)=
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若3x=7y,则y比x= ,x:(x+y)=
若3x=7y,则y比x= ,x:(x+y)=
若3x=7y,则y比x= ,x:(x+y)=
3:7
7:10
5
额...........y:x=3:7 ,x:(x+y)=7:(3+7)=7:10
3/7, 0.7
y:x=3/7 ;x:(x+y)=7/10
y:x=3:7,x:(x+y)=7:10
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