Question

A car rents for $45.00 per day plus 21 cents per mile. You are on a daily budget of $66.00 per day. What mileage will allow you to stay within your budget?

Answer 1

45+.21m is less than or equal to 66
-45 from both sides

.21m is less than or equal to 21
/.21 from both sides

m is less than or equal to 1000

you can go no more than 1,000 miles.