Problem number 26 of the Rhind Papyrus says:
Find a quantity such that when it is added to StartFraction 1 Over 4 EndFraction of itself the result is a 15.
The modern day equation that models this problem is x plus StartFraction 1 over 4 EndFraction x equals 15..
What is the solution to the equation?
x = 10
x = 12
x = 15
x = 30