Solve for R
\left\{\begin{matrix}R=\frac{tv^{2}}{E}\text{, }&t\neq 0\text{ and }v\neq 0\text{ and }E\neq 0\\R\neq 0\text{, }&\left(t=0\text{ or }v=0\right)\text{ and }E=0\end{matrix}\right.
Solve for E
E=\frac{tv^{2}}{R}
R\neq 0
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ER=v^{2}t
Variable R cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by R.
ER=tv^{2}
The equation is in standard form.
\frac{ER}{E}=\frac{tv^{2}}{E}
Divide both sides by E.
R=\frac{tv^{2}}{E}
Dividing by E undoes the multiplication by E.
R=\frac{tv^{2}}{E}\text{, }R\neq 0
Variable R cannot be equal to 0.
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