4/3(X+Y)=160 1/2X=3/2Y 解方程组
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4/3(X+Y)=1601/2X=3/2Y解方程组4/3(X+Y)=1601/2X=3/2Y解方程组4/3(X+Y)=1601/2X=3/2Y解方程组由1/2X=3/2Y得X=3Y代入4/3(X+Y)
4/3(X+Y)=160 1/2X=3/2Y 解方程组
4/3(X+Y)=160 1/2X=3/2Y 解方程组
4/3(X+Y)=160 1/2X=3/2Y 解方程组
由1/2X=3/2Y得X=3Y
代入4/3(X+Y)=160得4/3(3Y+Y)=160
4/3(4Y)=160
Y=30
X=3Y=90
是1/2X=3/2Y ,还是(1/2)X=(3/2)Y?
(1)如果是1/2X=3/2Y
把1/2X=3/2Y 代入4/3(X+Y)=160
解得y=90,x=30
(2)如果是(1/2)X=(3/2)Y
把(1/2)X=(3/2)Y代入4/3(X+Y)=160
解得y=30,x=90
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