A truck can be rented from basic rental for $50. per day. in addition, you have to be $0.20 per mile. continental charges $20. per day in addition to $0.50 per mile to rent out the same truck. How many miles must you drive in a day to make the rental cost for basic rental a better deal than that for continental?
Let x be the miles you drive in a day
For the basic rental, the mileage charge is 0.2* x dollars
So the total charge is ...
This shows how to determine which rate provides better deal for truck rental.