Solve for g
\left\{\begin{matrix}g=\frac{f}{4h}\text{, }&h\neq 0\\g\in \mathrm{R}\text{, }&f=0\text{ and }h=0\end{matrix}\right.
Solve for f
f=4gh
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4gh=f
Swap sides so that all variable terms are on the left hand side.
4hg=f
The equation is in standard form.
\frac{4hg}{4h}=\frac{f}{4h}
Divide both sides by 4h.
g=\frac{f}{4h}
Dividing by 4h undoes the multiplication by 4h.
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