Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 6 - Cumulative Review - Page 408: 50

Answer

$x=-4$

Work Step by Step

By cross-multiplication, in terms of $x$, the given equation, $ \dfrac{3x-4}{2x}=-\dfrac{8}{x} ,$ is equivalent to \begin{array}{l}\require{cancel} -x(3x-4)=2x(8) \\\\ -3x^2+4x=16x \\\\ -3x^2+4x-16x=0 \\\\ -3x^2-12x=0 \\\\ -3(x^2+4x)=0 \\\\ x^2+4x=\dfrac{0}{-3} \\\\ x^2+4x=0 \\\\ x(x+4)=0 \\\\ x=\{-4,0\} .\end{array} Upon checking, only $ x=-4 $ satisfies the original equation.
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