Solve for g
\left\{\begin{matrix}g=\frac{2\pi l}{T}\text{, }&l\neq 0\text{ and }T\neq 0\\g\neq 0\text{, }&T=0\text{ and }l=0\end{matrix}\right.
Solve for T
T=\frac{2\pi l}{g}
g\neq 0
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Tg=2\pi l
Variable g cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by g.
\frac{Tg}{T}=\frac{2\pi l}{T}
Divide both sides by T.
g=\frac{2\pi l}{T}
Dividing by T undoes the multiplication by T.
g=\frac{2\pi l}{T}\text{, }g\neq 0
Variable g cannot be equal to 0.
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