SOLUTION: The Jones family drove to Kankakee in 5 hours and returned in 4 hours. Their rate on the return trip was 9 mph faster than their rate going. Find their rate going

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Question 1150651: The Jones family drove to Kankakee in 5 hours and returned in 4 hours. Their rate on the return trip was 9 mph faster than their rate going. Find their rate going
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
                 SPEED       TIME      DISTANCE

GOING             r            5          d

RETURN          r+9            4          d

Same distance d both going and returning.
5r=4%28r%2B9%29
Solve.

highlight%28r=36%29