Answer
y=9
Work Step by Step
$7=y-2$ $\longrightarrow$ addition property
$7+2=y-2+2$ $\longrightarrow$ simplify
$9=y$
Substitute to check.
$7=9-2$
$7=7 \checkmark$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 2 - Section 2.6 - Solving Equations: The Addition and Multiplication Properties - Exercise Set - Page 148: 13
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