Answer
$8x$
Work Step by Step
In order to combine like terms, we use a form of the distributive property to rewrite $12x+3x-7x$ as $(12+3-7)x$
We add inside of the parentheses: $(12+3+(-7))x=8x$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - Chapter 1 Review Problem Set - Page 38: 43
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