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i am having trouble with these problems

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1 Answer

 Easiest way to graph is find the intercepts and connect and extend:
 
  Y =3x
 
   ( 0.0) is one point ( 1.3) another graph
 
   Y= X+2
 
  (0.2)  ( -2, 0)
     X - Y =10
   ( 0,-10) , (10,0 )