Answer
$-39$
Work Step by Step
Substituting $x=
7
,$ the given expression, $
-3(x-4)-2(x+8)
,$ evaluates to
\begin{array}{l}\require{cancel}
-3(7-4)-2(7+8)
\\\\=
-3(3)-2(15)
\\\\=
-9-30
\\\\=
-39
.\end{array}
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - Chapter 1 Review Problem Set - Page 38: 65
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