What is the y-coordinate of the solution for the system of equations? {x−y=1227+3y=2x enter your answer in the box.

the answer is 
x−y=12  
27+3y=2x equivalent to -2x +3y = -27
  x    − y =12  
 -2x +3y = -27
and  2x - 2y =24  (multiplied by 2 the first equation)
      -2x +3y = -27
       2x-2x -2y+3y=24-27
                          y= -3

the y coordinate of the solution for the system is y= -3