#### Answer

x=11

#### Work Step by Step

Adding $
-10
$ to both sides of the given equation, $
x+10=21
$, then,
\begin{array}{l}
x+10-10=21-10
\\\\
x=11
.\end{array}

Published by
Pearson

ISBN 10:
0-32184-874-8

ISBN 13:
978-0-32184-874-1

x=11

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