Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1-2 - Cumulative Review - Page 152: 8



Work Step by Step

Removing the grouping symbol and then combining like terms, the given expression, $ 3[4n-5(2n-1)]-3(n-7) $, simplifies to \begin{array}{l}\require{cancel} 3[4n-10n+5]-3n+21 \\\\= 3[-6n+5]-3n+21 \\\\= -18n+15-3n+21 \\\\= (-18n-3n)+(15+21) \\\\= -21n+36 .\end{array}
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