3X=5Y (X+Y)*3X=(2Y+X)*4+2*2
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3X=5Y(X+Y)*3X=(2Y+X)*4+2*23X=5Y(X+Y)*3X=(2Y+X)*4+2*23X=5Y(X+Y)*3X=(2Y+X)*4+2*23X=5YX:Y=5:3设X=5ky=3k则
3X=5Y (X+Y)*3X=(2Y+X)*4+2*2
3X=5Y (X+Y)*3X=(2Y+X)*4+2*2
3X=5Y (X+Y)*3X=(2Y+X)*4+2*2
3X=5Y
X:Y=5:3
设X=5k y=3k
则
(X+Y)*3X=(2Y+X)*4+2*2
(5k+3k)*3*5k=(2*3k+5k)*4+4
120k^2=44k+4
30k^2-11k-1=0
(6k+1)(5k-1)=0
k=-1/6 或 k=1/5
所以x=-5/6或x=1
y=-1/2或 y=3/5
就是这样
3X=5Y
X:Y=5:3
设X=5k y=3k
则
(X+Y)*3X=(2Y+X)*4+2*2
(5k+3k)*3*5k=(2*3k+5k)*4+4
120k^2=44k+4
30k^2-11k-1=0
(6k+1)(5k-1)=0
k=-1/6 或 k=1/5
所以x=-5/6或x=1
y=-1/2或 y=3/5
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