Solve g=F/piR

$$g = \frac { F } { \pi R }$$

Solve for F

$$F=\pi Rg$$

$$R\neq 0$$

Steps for Solving Linear Equation

Swap sides so that all variable terms are on the left hand side.

$$\frac{F}{\pi R}=g$$

The equation is in standard form.

$$\frac{1}{\pi R}F=g$$

Divide both sides by \pi ^{-1}R^{-1}.

$$\frac{\frac{1}{\pi R}F\pi R}{1}=\frac{g\pi R}{1}$$

Dividing by \pi ^{-1}R^{-1} undoes the multiplication by \pi ^{-1}R^{-1}.

$$F=\frac{g\pi R}{1}$$

Divide g by \pi ^{-1}R^{-1}.

$$F=\pi Rg$$

Solve for R

$$\left\{\begin{matrix}R=\frac{F}{\pi g}\text{, }&F\neq 0\text{ and }g\neq 0\\R\neq 0\text{, }&g=0\text{ and }F=0\end{matrix}\right.$$