HELPP ITS A 60 min test and a alr took up most of my time watching t|k tok :} so now i have 20 mins left I will Give Brainlest! And Make Sure if u can include how u did it! (using the equation below what is the inverse operation needed to isolate the variable y + 12 = 16)

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

How do you find the circumfrance of a circle?

I'm confused on this could anyone me and show me what i need to do to solve it.