解方程组:(x-y\2)-1=2x+y\2与(3x+y\3)+2=x-y\3.
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解方程组:(x-y\2)-1=2x+y\2与(3x+y\3)+2=x-y\3.
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1.(x-y)/2-2/2=(2x+y)/2
x-y-2=2x+y
x-2x-y-y=2
-x-2y=2
2.(3x+y)/3+6/3=(x-y)/3
3x+y+6=x-y
3x-x+y+y=-6
2x+2y=-6
x+y=-3
综合1.2.
由1.变形得x=-2-2y
带入2.得
-2-2y+y=-3
y=1
所以x=-3-1=-4
即x=-4 y=1
x-y-2=2x+y
x-2x-y-y=2
-x-2y=2
2.(3x+y)/3+6/3=(x-y)/3
3x+y+6=x-y
3x-x+y+y=-6
2x+2y=-6
x+y=-3
综合1.2.
由1.变形得x=-2-2y
带入2.得
-2-2y+y=-3
y=1
所以x=-3-1=-4
即x=-4 y=1
解方程组:(x-y\2)-1=2x+y\2与(3x+y\3)+2=x-y\3.
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