Crane A can unload a ship in 10 hours and crane B can unload it in 14 h. How long will it take the two cranes to unload the ship working together? What is the correct equation to solve this problem?

Question

anonymous · Answer

The possible answers

mertsj · Answer

A does 1/10 of the job per hour so in x hours it does x/10 of the job.
B does 1/14 of the job per hour so in x hours i does x/14 of the job.
Working together the do 1 entire job so:
$$\frac{x}{10}+\frac{x}{14}=1$$

mertsj · Answer

Do the answer police approve of my answer?

hero · Answer

Let's just admit, giving answers only isn't very helpful and not was OS was meant to be.