Can some explain very quickly what $ |5 x + 20| = 5 $ actually means? I don’t mean to bother the community with something so easy, but for the life of me, I can’t remember how to do these. I even forgot what they were called, and I’m referring to the use of the “$ | $” symbol in math. I think I may have been studying too much all day. This is my last section, and if I can’t even remember the name, then I can’t look it up.
Can some please tell me what these types of math problems are called and how to solve them? I just need to see someone do it. I remember it was easy, but it’s been sometime since I’ve last seen these. I really do appreciate everyone helping me study today. I couldn’t of done it without ya! ^_^

Problem. Solve for $ |5 x + 20| = 5 $ for $ x $.


The equation $$\lvert a+b\rvert=c$$ may be read as "the distance from the number $a$ to the number $-b$ is $c$."
With this in mind, the equation 
$$
\lvert5x+20 \rvert=5
$$
is the collection of all $x$ so that the distance from the number $5x$ to the number $-20$ is $5$. Can you find all such $x$?
