SOLUTION: One watering system needs about three times as long to complete a job as another watering system. when both systems operate at the same time the job can be completed in nine minute
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Question 940282: One watering system needs about three times as long to complete a job as another watering system. when both systems operate at the same time the job can be completed in nine minutes. how long does it take each system to do the job alone? Answer by CubeyThePenguin(3113) (Show Source):
