7th Grade Math
posted by Rebecca .
Carlos and maria drove a total of 258 miles in 5 hours. carlos drove the first part of the trip and averaged 50 miles per hour. maria drove the remainder of the trip and averaged 55 miles per hour. for approximately how many hours did maria drive?

let Carlos' time be t hrs
then Maria's time is 5t hrs
solve for t
50t + 55(5t) = 258