Question 295627
The given equations are
2x-9y=-21     ...(1)
-3x-7y=11     ...(2)
(1)*3 =>   6x-27y = -63  .. (3)
(2)*2 =>   -6x-14y = 22  ...(4)
(3)+(4) =?    -41y= -41
                 y= (-41)/(-41)
                 y=1
(1) =>     2x-9*1 = -21
           2x = -21+9
           2x = -12
           2x= -12
           x = -12/2
           x = -6
The solution is (-6,1)