Precalculus (10th Edition)

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



Work Step by Step

Add $x-4$ to both sides: $3x+4+(x-4)=8-x+(x-4)\\ 4x=4$ Divide both sides by $4$: $\dfrac{4x}{4}=\dfrac{4}{4}\\ x=1$.
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