Answer
$2(4+x)$
Work Step by Step
"Twice" means you will multiply by $2$
"the sum of" means $2(an addition expression)$
"the sum of four and a number" means $(4+x)$
OR
$2(4+x)$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 6 - Cumulative Review - Page 407: 1f
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