Hi,         

Solving the system by substitution

y = -3x+9   green line

-4x+2y=-2   blue line

-4x+2(-3x+9)= -2

-4x -6x + 18 = -2

   -10x = -20

      x = 2

      y = -3x+9

      y = -6+9

      y = 3



 

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