Answer
s=6
Work Step by Step
20-7s=26-8s
First add 8s to both sides
20-7s+8s=26
20+s=26
Then subtract 20 from both sides
s=26-20
s=6
Check the answer
20-7(6)=26-8(6)
20-42=26-48
-22=-22
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 2 - Section 2.1 - The Addition Property of Equality - Exercise Set - Page 120: 52
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