math
posted by connie .
A truck can be rented from basic rental for $50 a day. in addition you have to pay .20 cents per mile. Cont. truck charges $20 per day in addition to 50 cents per mile. How many miles must you drive in a day to make the rental cost for basic a better deal than Cont.?

50+.2m<20+.5m
subtract 20 from each side, and subtract .2m from each side.
30<.3m
100<miles