First you multiply 2 * 28.95 because he rents the car for 2 day and the agency charges per day. That's 57.9 and if you subtract 250 (the budget) from how much he has to pay then it leaves with how much he can spend on miles.That's $192.1 and it cost 0.027 cents per mile so divide 192.1 by 0.027 and thats your answer
The reason is because it is not just 6 it is - 6 so when there are two negative numbers they don't subtract they add if it was 6n then it was to be subtracted
