SOLUTION: A does 7/10 of a piece of work in 14 days. He then calls B, and they finish the work in 2 days. How long would B take to do the work by himself?

Question 1022954: A does 7/10 of a piece of work in 14 days. He then calls B, and they finish the work in 2 days. How long would B take to do the work by himself?
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
The normal set up for work problems is

In our problem, A completes 7/10 of the job in 14 days. That means he could do it all in 20 days.
Our t in the set up is 2 days, and the 1 job in the set up is only 3/10 job here.
So our equation looks like this

and when you work that out you find
B = 10 days
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