Two pony express riders rode equal parts of a 286 mile trip. each rider rode the same number of miles. they changed horses every 13 miles. how many horses did each rider use?

You coordinate volunteers for litter cleanup in local parks. your spreadsheet lists drivers and the number of seat belts in each driver’s car. the spreadsheet calculates the number of drivers (d) and the total number of seat belts (s). you want to know the maximum number of volunteers, besides drivers, that can be transported to the park in a single trip given that each person must have a seat belt of their own.