y-(x-y)=8,x+(x-y)=29 求x,

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y-(x-y)=8,x+(x-y)=29求x,y-(x-y)=8,x+(x-y)=29求x,y-(x-y)=8,x+(x-y)=29求x,y-(x-y)=8x+(x-y)=29化简:2y-x=8.(1

y-(x-y)=8,x+(x-y)=29 求x,
y-(x-y)=8,x+(x-y)=29 求x,

y-(x-y)=8,x+(x-y)=29 求x,
y-(x-y)=8
x+(x-y)=29
化简:
2y-x=8.(1)
2x-y=29 .(2)
(1)+2 * (2)得:
3x=66
x=22
代入(1)得:
2y-22=8
y=15