## Intermediate Algebra for College Students (7th Edition)

$I=\dfrac{E}{R+r}$
Factor out $I$ on the left side to find: $I(R+r)=E$ Divide by $R+r$ on both sides to find: $\dfrac{I(R+r)}{R+r} = \dfrac{E}{R+r} \\I=\dfrac{E}{R+r}$