SOLUTION: a and b drove 315 hours together. b drove 21 times longer than a. how many hours did a drive?

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Question 332399: a and b drove 315 hours together. b drove 21 times longer than a. how many hours did a drive?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
x+21x=315
22x=315
x=14.3
21x=300.7