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: 56


The sum of their ages is $3y$ years.

Work Step by Step

Maria is $y$ years old. In order to find her sister's age, which is twice her age, we must multiply her age by $2$. When we multiply $y$ by $2$, we get $2y$. To find the sum of their ages, we must add their ages: $y+2y=3y$
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