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Verified Answer :

Hi fren,

x=−y+1
and for the second one...
y=2x+2


x-intercept >> (−1,0)
y-intercept >> (0,2)

x+y=1      is really      -1+0=1       so      x = -1     y = 0   

2x-y=-2    is really     2*0+2=-2    so     x = 0      y = 2

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