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 - Mid-Chapter Check Point - Page 155: 18


All real numbers

Work Step by Step

12x-4+8x-4=4(5x-2) 12x-4+8x-4=4(5x)-4(2) 12x-4+8x-4=20x-8 (12x+8x)+(-4-4)=20x-8 20x-8=20x-8 20x-20x-8=-8 0-8=-8 -8=-8 Therefore, this equation is true for all real numbers.
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