SOLUTION: Please help me solve this problem!: Mrs. Smith balances the company books in 5 hours. it takes her assistant 7 hours to do the same job. If they work together, find how long it tak

Question 1079605: Please help me solve this problem!: Mrs. Smith balances the company books in 5 hours. it takes her assistant 7 hours to do the same job. If they work together, find how long it takes them to balance the books.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
in 1 hour, Mrs. does 1/5 and her assistant 1/7 of the books.
x hours to do the whole thing.
x/5 + x/7=1
multiply everything by 35
7x+5x=35
12x=35
x=35/12
=2 11/12 hours

RELATED QUESTIONS
Please help me solve the following problem: Mark and Rachel both work for Smith... (answered by ankor@dixie-net.com)

Please help me solve this problem. A physics professor can perform an experiment two... (answered by Theo)

Please help me answer this word problem: If Mrs. Smith takes her class of 12 students to... (answered by stanbon)

A painter can finish painting a house in 5 hours. Her assistant takes 7 hours to finish... (answered by Alan3354)

It takes 5 hours for Anthony to fix a drain pipe. If his assistant helps him, it takes 3... (answered by Edwin McCravy)

please help me with this problem ): I have no idea where to begin and how to solve this.... (answered by josgarithmetic,josmiceli)

A painter can finish painting a house in 3 hours. Her assistant takes 5 hours to finish... (answered by ewatrrr)

Please help me solve this work problem: Carmine can do her assignment in x hours. what... (answered by Timnewman)

Hats may be ordered from a supplier for $7.50 each or $60 for ten. Mrs Smith orders some (answered by Edwin McCravy,MathTherapy)