Solve for h
\left\{\begin{matrix}h=\frac{F}{\pi \beta }\text{, }&\beta \neq 0\\h\in \mathrm{R}\text{, }&F=0\text{ and }\beta =0\end{matrix}\right.
Solve for F
F=\pi h\beta
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\pi \beta h=F
Swap sides so that all variable terms are on the left hand side.
\frac{\pi \beta h}{\pi \beta }=\frac{F}{\pi \beta }
Divide both sides by \pi \beta .
h=\frac{F}{\pi \beta }
Dividing by \pi \beta undoes the multiplication by \pi \beta .
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