Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 6 - Section 6.6 - Rational Equations - Exercise Set - Page 462: 18

Answer

Solution set = $\{7\}$.

Work Step by Step

First, we exclude those values of x that yield a zero in any of the denominators. $x\not\in\{-5,+5 \}\qquad (*)$ The first denominator is a difference of squares, $(x+5)(x-5)$ Multiply the equation with the LCD=$(x+5)(x-5)$ $ 32=4(x-5)+2(x+5)\qquad$ ... simplify (distribute) $32=4x-20+2x+10$ $ 32=6x-10\qquad\qquad $ ... add $10$ $42=6x$ $ x=7 \qquad$ ...Checking (*), this is a valid solution Solution set = $\{7\}$.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.