Question 255587
The given equations are,
           4x-y=9    ...(1)
           x+3y=16   ...(2)
(1)*3=>   12x-3y=27  ...(3)
(2)+(3)=> 13x = 43
            x = 43/13
Substituting in (1),
          4*(43/13)-y = 9
          172/13-9 = y
          (172-117)/13 = y
          y = 55/13
Therefore the solution is
          x = 43/13  and   y = 55/13