x/3-(y-1)/6=3 2(y-x/2)=3(y-x/18)x/3-(y-1)/6=32(y-x/2)=3(y-x/18)

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x/3-(y-1)/6=32(y-x/2)=3(y-x/18)x/3-(y-1)/6=32(y-x/2)=3(y-x/18)x/3-(y-1)/6=32(y-x/2)=3(y-x/18)x/3-(y-

x/3-(y-1)/6=3 2(y-x/2)=3(y-x/18)x/3-(y-1)/6=32(y-x/2)=3(y-x/18)
x/3-(y-1)/6=3 2(y-x/2)=3(y-x/18)
x/3-(y-1)/6=3
2(y-x/2)=3(y-x/18)

x/3-(y-1)/6=3 2(y-x/2)=3(y-x/18)x/3-(y-1)/6=32(y-x/2)=3(y-x/18)
x/3-(y-1)/6=3………………(1)
2(y-x/2)=3(y-x/18)…………(2)
整理(1),得:
2x-y+1=18
y=2x-17…………(3)
整理(2),得:
2y-x=3y-x/6
y=-5/6*x
与(3)联立,得:
2x-17=-5/6*x
17/6*x=17
x=6
代入(3),得:
y=2×6-17=-5
方程组的解为:
x=6
y=-5

=x-y+1-2|y-x|-6+|y-x|+5
=x-y-|y-x|
若X大于Y,则y-x小于0,所以原式等于0
若x=y ,则y-x=0 ,所以原式=0
若x小于y,则y-x大于0, 所以原式=2x-2y