SOLUTION: Took Brian six hours to drive to the sales conference he took the same route on the way back home but this time the trip took seven hours if Brian drove 9 mph faster on his way to

Question 1004153: Took Brian six hours to drive to the sales conference he took the same route on the way back home but this time the trip took seven hours if Brian drove 9 mph faster on his way to the conference how fast did he drive on the way back home?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Took Brian six hours to drive to the sales conference he took the same route on the way back home but this time the trip took seven hours if Brian drove 9 mph faster on his way to the conference how fast did he drive on the way back home?

the way back home speed = x
time the trip took seven hours
distance = 7x

Took Brian six hours to drive to the sales conference
distance = 7x
time = 6
speed = (x+9)
7x/(x+9)= 6
7x = 6x +54
x = 54 mph 0n his way back home

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