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-x+2y+2=4
2x=5y+4-5
-x+2y+2=4
2x=5y-1
2y=x-2+4
2x=5y-1
2y=x+2
2x=5*(x+2)-1
2y=x+2
2x=5x+10-1
2y=x+2
2x-5x=9
2y=x+2
-3x=9/:(-3)
2y=x+2
x=-3
2y=-3+2
x=-3
2y=-1/ :2
x=-3
y=1/2