Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 6 - Algebra: Equations and Inequalities - 6.3 Applications of Linear Equations - Exercise Set 6.3 - Page 373: 11


Translation to algebraic expression (not simplified yet): $x - (x+4)$ Simplified form: $-4$

Work Step by Step

Let $x$ = the unknown number Then sum of the number and four = $x + 4$ A number decreased by the sum of the number and four = $x - (x+4)$ Simplifying gives: $=x-x -4 \\=-4$
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