Answer
$\dfrac{8}{19}$
Work Step by Step
Need to simplify the given equation for $x$.
$(3x)(4)-(7)(-x)=8 \\12x++7x=8 \\19 x=8 \\ x=\dfrac{8}{19}$
Thus, the obtained value of $x$ is equal to $\dfrac{8}{19}$.
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 9 - Systems and Matrices - Chapter 9 Test Prep - Review Exercises - Page 954: 47
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