Solve for x
\left\{\begin{matrix}x=\frac{y}{If}\text{, }&f\neq 0\text{ and }I\neq 0\\x\in \mathrm{R}\text{, }&\left(f=0\text{ or }I=0\right)\text{ and }y=0\end{matrix}\right.
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Ifx=y
The equation is in standard form.
\frac{Ifx}{If}=\frac{y}{If}
Divide both sides by If.
x=\frac{y}{If}
Dividing by If undoes the multiplication by If.
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