Rita has an investment account which compounds interest annually at a rate of 5.2%. After 6 years, she has $4500 in the account. How much money did she initially place in the account

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