SOLUTION: Tom drove from Toronto to Owen sound, a distance of 550km. The trip took 7 hours. Tom drove at 70km/h for the part of the trip and at 85km/h for the remainder of the trip. How far

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: Tom drove from Toronto to Owen sound, a distance of 550km. The trip took 7 hours. Tom drove at 70km/h for the part of the trip and at 85km/h for the remainder of the trip. How far      Log On

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Question 1161279: Tom drove from Toronto to Owen sound, a distance of 550km. The trip took 7 hours. Tom drove at 70km/h for the part of the trip and at 85km/h for the remainder of the trip. How far did he drive at 70km/h?
much appreciated :)
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
                  SPEED        TIME      DISTANCE

partone            70           x         70x

parttwo            85          7-x       85(7-x)

TOTAL                           7         550

70x%2B85%287-x%29=550
Simplify, and solve for x.