Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 2 - Graphs and Functions - 2.5 Equations of Lines and Linear Models - 2.5 Exercises - Page 246: 70

Answer

$\{ 1 \}$

Work Step by Step

Step 1. Graph $y=7x - 2x + 4 - 5$ as shown in the figure (red). Step 2. Graph $y=3x + 1$ as shown in the figure (blue). Step 3. Find the intersect at point $(1,4)$, thus $x=1$. Step 4. The solution is $\{ 1 \}$
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