Answer
Both expressions have the same value, $28$.
$9x-2x=7x$
Work Step by Step
Evaluating $9x-2x$ when $x=4:$
$9(4)-2(4)=36-8=28$
Evaluating $7x$ when $x=4:$
$7(4)=28.$
Our observations:
Both expressions have the same value, $28$.
$9x-2x=7x$
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 1 - Section 1.3 - The Real Numbers - Exercise Set - Page 43: 126
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