Respuesta :

Answer:

-2y

Step-by-step explanation: First, multiply 12 with x and y. Then do the property of substitution and add 12x and 12y with -14y and -12x
-14y + 12(x+y) -12x
-14y+12x+12y-12x
-14y+12y= -2y
12x-12x=0
So: -2y+0= -2y
The answer is -2y

I hope this helps