Introductory Algebra for College Students (7th Edition)

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


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, $28$. $9x-2x=7x$
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