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