SOLUTION: Working together Erica and Shawna can answer a days worth of customer-service emails in 4 hours. Working alone, Erica takes 6 hours longer than Shawna. How long would it take Shawn

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Question 1006915: Working together Erica and Shawna can answer a days worth of customer-service emails in 4 hours. Working alone, Erica takes 6 hours longer than Shawna. How long would it take Shawna to answer the emails alone?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
1%2Fx Shawna's rate. Numerator of 1 is for ONE day's work. x is how much time.

Erica's rate is 1%2F%28x%2B6%29.


First part of description means 1%2Fx%2B1%2F%28x%2B6%29=1%2F4.
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Fraction Skills! Multiply left side and right side by 4%2Ax%2A%28x%2B6%29.