Laura rode her bike for 3 5/8 hours on saturday and for 4 1/2 hours on sunday. which is the best estimate of the time laura spent riding her bike on saturday and sunday ?

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