Answer
$7$
Work Step by Step
Substitute the value of $x$ to have: obtain:
$-x=-(-7) = 7$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 1 - Review Exercises - Page 98: 34
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