SOLUTION: Tony worked 9/10 of an hour on a project. That is three times as long as Bill worked. How many hours did they work in all?

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Question 133486: Tony worked 9/10 of an hour on a project. That is three times as long as Bill worked. How many hours did they work in all?
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
Bill worked (9/10)/3=3/10 so total is 9/10+3/10=12/10=6/5
Answer: 6/5 hours