Answer
$x=1$
Work Step by Step
Add $x-4$ to both sides:
$3x+4+(x-4)=8-x+(x-4)\\
4x=4$
Divide both sides by $4$:
$\dfrac{4x}{4}=\dfrac{4}{4}\\
x=1$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 11 - Systems of Equations and Inequalities - 11.1 Systems of Linear Equations: Substitution and Elimination - 11.1 Assess Your Understanding - Page 714: 1
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