Solve the system of linear equations. 9x-19y=74 and 3x+3y=6

Solve the system of linear equations. 9x-19y=74 and 3x+3y=63x+3y=6 

Solve equation #2 for x
3x = 6-3y
  x = 2-y

Plug x above in equation #1 to find y
9x-19y=74 
9(2-y) - 19y = 74
18 - 9y -19y = 74
-28y = 74 - 18
-28y =56
      y =56/(-28)
      y = -2
plug y = -2 into x = 2-y to look for x

x = 2 -(-2)
x = 2 +2 
x = 4

OK answer x = 4 and y = -2

{x, y} = {4, -2}