Answer
$1 - \frac{a}{S} = r $
Work Step by Step
$S = \frac{a}{1-r}$
To make r the subject, cross multiply:
$ 1-r = \frac{a}{S}$
$1 - \frac{a}{S} = r $
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 1 - Section 1.1 - Linear Equations - 1.1 Assess Your Understanding - Page 91: 81
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