Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.1 - Numerical and Algebraic Expressions - Problem Set 1.1 - Page 7: 54

Answer

$54$

Work Step by Step

Substituting $ n=4 ,$ the given expression, $ 78-3[4(n-2)] ,$ evaluates to \begin{array}{l}\require{cancel} 78-3[4(4-2)] \\\\= 78-3[4(2)] \\\\= 78-3[8] \\\\= 78-24 \\\\= 54 .\end{array}
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