Elementary Algebra

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

Chapter 2 - Real Numbers - 2.5 - Translating from English to Algebra - Problem Set 2.5 - Page 81: 38



Work Step by Step

Let us call the other number $z$. Since the sum of the two numbers is $100$, we can write the following equation: $z+x=100$ We must solve the equation for $z$, because we are looking for the other number. To do so, we subtract $x$ from each side of the equation: $z=100-x$ Since the other number is equal to $z$, the other number is $100-x$
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