Hi

solving by substitution

  x = -3y

 3y + x = -1

 3y + (-3y) = -1

      0 ≠ -1   there is NO solution 

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
 .....1            



.........2

------------------------...



.....1 .....solve for            













.........2







graph:









From the graph, we can see that the two lines are parallel and will  . 



So there are   and the system is . 







 

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