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It takes Bill 8 hours to paint a house. It take Paul 4 hours to paint a house. And it takes Quincy 9 hours to paint a house. How many hours would it take them working together?

 Sep 6, 2020
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1/8 + 1/4 + 1/9 = 1/x     Solve for x    The hours required for all 3  working

 Sep 7, 2020

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