Answer
$m=13$
Work Step by Step
$9=m-4$
Add 4 to both sides:
$9+4=m-4+4
\\13 = m$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 2 - Solving Equations - 2-1 Solving One-Step Equations - Lesson Check - Page 85: 2
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