SOLUTION: Two drivers leave Omaha at the same time, one driving east and the other west. The average speed of the eastbound car is 12km/h more than the speed of the other car. After 2h, the

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Question 168377: Two drivers leave Omaha at the same time, one driving east and the other west. The average speed of the eastbound car is 12km/h more than the speed of the other car. After 2h, the cars are 336km apart. What are their speeds?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
call speed of the east bound r+12
.....speed of the west bound r
distance of the west bound d
and distance of the east bound 336-d
(r+12)2=d.....eq 1 or 2r+24=d
r(2)=336-d....eq 2....now add the equations together to eliminate the d terms
4r=312
highlight%28r=78%29 speed of the west bound
highlight%28r%2B12=78%2B12=90%29 speed of the east bound