SOLUTION: it takes jack 3.5 hours to complete a job and it takes 2 hours for eleanor to do the same job. How long would it take for them to complete the job working together?

Question 684008: it takes jack 3.5 hours to complete a job and it takes 2 hours for eleanor to do the same job. How long would it take for them to complete the job working together?
Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!
Let x = time it takes them to do the job together.

First fraction is UGLY, so multiply numerator and denominator by 2 to clear the decimal:

Next, add the fractions with LCD = 14:

Invert the fractions:

x= 14/11 hours

Dr. Robert J. Rapalje, Retired
Seminole State College of Florida

www.mathinlivingcolor.com.

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