Answer
$x=4$.
Work Step by Step
If two lines are parallel then their slopes must be equal.
If it is parallel to $x=5$, then the equation must be $x=m$. $(4,2)$ is on the line, hence $x=4$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 1 - Graphs - 1.3 Lines - 1.3 Assess Your Understanding - Page 31: 65
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