Solve for A
\left\{\begin{matrix}A=\frac{CI}{E}\text{, }&E\neq 0\\A\in \mathrm{R}\text{, }&\left(C=0\text{ or }I=0\right)\text{ and }E=0\end{matrix}\right.
Solve for C
\left\{\begin{matrix}C=\frac{AE}{I}\text{, }&I\neq 0\\C\in \mathrm{R}\text{, }&\left(A=0\text{ or }E=0\right)\text{ and }I=0\end{matrix}\right.
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EA=CI
The equation is in standard form.
\frac{EA}{E}=\frac{CI}{E}
Divide both sides by E.
A=\frac{CI}{E}
Dividing by E undoes the multiplication by E.
CI=AE
Swap sides so that all variable terms are on the left hand side.
IC=AE
The equation is in standard form.
\frac{IC}{I}=\frac{AE}{I}
Divide both sides by I.
C=\frac{AE}{I}
Dividing by I undoes the multiplication by I.
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