Answer
$21$
Work Step by Step
$7x$
Substitute $3$ in for $x$
$7(3)$
Simplify
$21$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 1 - Review - Page 43: 1
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