I didnt know how to name this topic, but hopefully someone can help

heres the equation:

(one-fourth y minus two thirds y equals 5)

1/4y - 2/3y = 5

I have the answer, which is -12. But can someone explain to me HOW to get the answer without plugging -12 in? When I start moving numbers to the other side I end up getting a number thats waay off by the end of it.

Thank you!