Answer
$7(x+3y-1)$
Work Step by Step
$7x+21y-7$
Take out common factor $7$:
$7x+21y-7=7(x+3y-1)$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 6 - Section 6.1 - The Greatest Common Factor - Exercise Set - Page 421: 36
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