pedro and juan can do a piece of work in 3( 3)/(7) days. if pedro works in 3 days and juan in 4 days, they will finish the work. find the time required by each to do the work.

Answer 1

I thought you just said it takes Pedro 3 days, and Juan 4 days. I suspect something has been lost in translation.

Also, the notation 3 (3)/(7) is very unusual. Usually it is written as 3 3/7, unless you meant something else.