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

$54$

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}

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.