What are these math equations called??? Going crazy l..

Hello people, yes I am aware that this is a math question in a health form group thing. And for that I'm sorry...kinda

Anyways!!

I need help identifying what type of equations these are. You see, I am trying study for a college entry exam that I have coming up and I keep taking online test for practice. These are the problems I've been struggling with. Please don't give me any crap about how dumb I am for not knowing these, I missed a lot of high school due to some health problems so I'm learning some of this for the first time😩.

I'm NOT asking for the answers, it already gave me the answers to every question after I completed the practice test.

I'm trying to study them so I can do better by looking up ways to solve equations like this online but have no freaking idea what they are called.

I just need to know what I need to look up so I can find study videos😩😫😩😫😩

So again, if you can just tell me what the equations are called you would be making this girl really happy