Solve for g
\left\{\begin{matrix}g=\frac{E}{2h}\text{, }&h\neq 0\\g\in \mathrm{R}\text{, }&E=0\text{ and }h=0\end{matrix}\right.
Solve for E
E=2gh
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2gh=E
Swap sides so that all variable terms are on the left hand side.
2hg=E
The equation is in standard form.
\frac{2hg}{2h}=\frac{E}{2h}
Divide both sides by 2h.
g=\frac{E}{2h}
Dividing by 2h undoes the multiplication by 2h.
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