what is the value of y? (posting picture below)

Question

anonymous · Answer

|dw:1429816319997:dw|

alexalas · Answer

well I will give you the equation
180=56+y+(y-12)
Use the distributive property

alexalas · Answer

do you understand?

anonymous · Answer

honestly not at all. i suck at math and i also dislike it a lot, lol @alexalas

alexalas · Answer

okay let me explain the angles of a triangle always add up to 180 okay.

anonymous · Answer

ok gotcha

alexalas · Answer

|dw:1429816789963:dw|
I named the angles A,B, and C
So A+B+C should equal 180 right

alexalas · Answer

you still there?

anonymous · Answer

right

alexalas · Answer

So the equation should be 180=A+B+C and to simplify it is
180=56+y-12+y
then you add like terms(for example y+x+y+x you get 2x+2y 
180=56-12+2y
180=44+2y
Then to move something from one side of the equation to the other you must subtract it so
180-44=44-44+2y
to get rid of 2y we divide each side by 2
and you end up with |dw:1429817308590:dw|