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

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(39618) (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

Simplify, and solve for x.
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