11/12 of the disk space on a hard drive is unused. 3 people
need to use the remaining disk
space evenly. How much of the
total disk space will 1 user get?

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