Answer
$(12+3)+x$
Work Step by Step
For any real numbers a, b, and c:
(i) Associative Property of Addition: $a+(b+c)=(a+b)+c$
Thus, using the associative property, an expression equivalent to the given expression is:
$(12+3)+x$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 1 - Section 1.2 - Operations with Real Numbers and Simplifying Algebraic Expressions - Exercise Set - Page 28: 106
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