Answer
$\{ 3 \}$
Work Step by Step
Step 1. Graph $y=2x+7-x$ as shown in the figure (red).
Step 2. Graph $y=4x-2$ as shown in the figure (blue).
Step 3. Find the intersect at point $(3,10)$, thus $x=3$.
Step 4. The solution is $\{ 3 \}$
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 2 - Graphs and Functions - 2.5 Equations of Lines and Linear Models - 2.5 Exercises - Page 246: 69
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