#### 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
$2(4+x)$

Published by
Pearson

ISBN 10:
0321785045

ISBN 13:
978-0-32178-504-6

$2(4+x)$

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