David's company reimburses his expenses on food, lodging, and conveyance during business trips. the company pays $60 a day for food and lodging and $0.65 for each mile traveled. david drove 600 miles and was reimbursed $3,390.

part a: create an equation that will determine the number of days x on the trip.
part b: solve this equation justifying each step with an algebraic property of equality.
part c: how many days did david spend on this trip?