8)Two-thirds of z is added to 5 9)6 is added to two-fifths of s

10)Add four-fifths to 2 times w

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