The ratio of the number. of cookies to the number of candies in different gift boxes is 5:7 which table best shows the number of cookies and candies in different gift boxes

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