Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 2 - Real Numbers - Chapter 2 Review Problem Set - Page 88: 49


The other number is $72−n$.

Work Step by Step

Let us call the other number $g$. If the sum of $n$ and the other number, $g$, is $72$, we can represent this with the following equation: $g+n=72$. We are looking for $g$. In order to find it, we must subtract $n$ on both sides of the equation: $g=72−n$. Since the "other number" is $g$, the "other number" is $72−n$.
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