Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 6 - Section 6.5 - Translating Words into Algebraic Symbols - Exercises - Page 248: 16



Work Step by Step

We can call our unknown number "$x$". The number mentioned in the exercise is the same, so we can write the sum of a number and the number decreased by 5 as: $x+(x-5)$. (Remember to add the parenthesis!) So, $x+(x-5)=25$
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