Answer:
y-2x=-1
y=-1+2x
y=-(2x-1)
y=-2x+1---->
6x-3y=3 (or 2x-y=1)
2x-(-2x+1)=1
2x+2x-1=1
4x=2
x=1/2
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subtitate 1/2
y-2(1/2)=-1
y-1=-1
y=0
hope it helps you
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