Elementary Algebra
posted by Taba .
"The university of Oklahoma maintains a fleet of vehicles to rent to university departments. To transport equipment, the School of Drama needs to rent either a cargo can or a pickup truck for one day. The cargo van costs $28 for a day, plus $0.22 per mile. The pickup truck costs $29 for a day plus $0.17 per mile. For what mileage is the cost the same?"
I'm supposed to work this out with systems of equations, but I can't seem to figure out anything that works. Please help me word this problem!

28 + .22m = 29 + .17m
Solve for m.