Question 404599
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Hi
solving the linear system using substitution
y-x= -6  | x = (y+6)
3y+x=2 
3y + (y+6) = 2  |substituting for x
solving for y
  4y = -4
   y = -1   x = 5   (y+6)

CHECKING our Answer***
y-x= -6
-1-5 = -6