A can do a piece of work in 4 days and B in 6 days. How long will they require working together ?(adsbygoogle = window.adsbygoogle || []).push({});

Hint. 1/4 + 1/6 = 1/x

I just don't get them ( The problem and the hint).

Can you help me understand it ?

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# Homework Help: Word problem

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