Ms. Sanchez's guests drank 534534 gallons of pink lemonade in 1414 hour. What was the average rate in gallons per hour which her guests drank the pink lemonade?

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30