algebra is numbers and variable's. You will learn a bit of it in 6th grade.you have to find x or do some other things.
https://www.youtube.com/watch?v=3vDoEVRS_7s
^^^ gives a good example I do Not own the video all rights go to the owner. its on you tube!
Step-by-step explanation:
y + 3 = - (x + 3)
y + 3 = -x - 3
y = -x - 6