Answer
$I=\frac{E}{R+r}$
Work Step by Step
$IR + Ir = E$
$I(R+r)=E$
$I=\frac{E}{R+r}$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.7 - Equations - Exercise Set - Page 106: 37
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