Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 2 - Equations, Inequalities, and Problem Solving - 2.2 Using the Principles Together - 2.2 Exercise Set - Page 94: 28



Work Step by Step

Using the properties of equality, the solution to the given equation, $ 6.4-2.5n=2.2 $, is \begin{array}{l} -2.5n=2.2-6.4 \\\\ -2.5n=-4.2 \\\\ n=\dfrac{-4.2}{-2.5} \\\\ n=1.68 .\end{array} Checking: \begin{array}{l} 6.4-2.5(1.68)=2.2 \\\\ 6.4-4.2=2.2 2.2=2.2 \text{ (TRUE)} .\end{array} Hence, the solution is $ n=1.68 .$
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