Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 2 - Section 2.5 - An Introduction to Problem Solving - Exercise Set: 3

Answer

The number is $237$.

Work Step by Step

Let $x$ = the unknown number Then "a number and decreased by 23" means $x-23$. Thus, the equation that represents the situation is: $x-23=214$ Add 23 on both sides of the equation to obtain: $x= 214+23 \\x=237$
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