#### Answer

This is not a solution to the equation.

#### Work Step by Step

We follow the instructions to plug in -10 for b.
$3(-10)-9=21
\\\\
-30-9=21
\\\\
-39\ne21$
-39 does not equal 21, so this is not a solution to the equation.

Published by
Prentice Hall

ISBN 10:
0133281140

ISBN 13:
978-0-13328-114-9

This is not a solution to the equation.

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