25 is the starting point. 5 is daily, so that's going to be attached to the variable x, aka how many days you rent the car. It's less than or equal to since you don't want to go above 60.
A <em>daily fee</em> of five dollars, means that you pay five dollars perday.
Twenty-five dollars stays the way it is because you are just renting it.
Budget is restricted, so it must be <em>less</em><em> </em><em>than</em><em> </em><em>or</em><em> </em><em>equal</em><em> </em><em>to</em><em> </em>sixty dollars.