Answer
$x-(8-x)$
$2x-8$
Work Step by Step
$x$ is being decreased (implying subtraction) by the difference between $8$ and $x$, which would be $(8-x)$. Therefore you get $x-(8-x)$, which equals $x-8+x$, which equals $2x-8$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.1 - Algebraic Expressions, Mathematical Models, and Real Numbers - Exercise Set - Page 18: 122
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