Mateo traveled by bus from Denver to San Diego and then on to San Francisco. His ticket from Denver to San Diego cost $170.50. The ticket from San Diego to San Francisco cost $95.75. What was the total cost of transportation

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