Hi

solving by Elimination method

6x-y = 20

3x-y = 7



 6x-y = 20

-3x+y = -7   | Multiplying the second Eq by -1 to eliminate y

   3x = 13

    x = 13/3 and y = 6    ( y = 3x -7 from the 2nd origial Eq )

  Solution is (13/3, 6)

CHECKING our Answer***

 6x-y = 20

6*(13/3)- 6 = 26 - 6 = 20 





 

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