Each person attending a two-day conference receives 4 meal vouchers to use.

part a: write an algebraic expression that can be used to find the total number of meal vouchers needed for the conference. describe what the variable stands for in this expression.

part b: a total of 3,824 meal vouchers are needed. how many people are attending the conference? show your work.

ps: it will mean the world to me if someone : )