Kazito sold an item for sh 4950 and made a 12 ¹/2profit. what was the cost price of the item?

Answer this question, only if you know the answer. 30 points and brainliest!

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.

Solve 2x+y=3 x+y=5 in substitution method