Solve R=U/I

$$R = \frac{ U }{ I }$$

Solve for I

$$\left\{\begin{matrix}I=\frac{U}{R}\text{, }&U\neq 0\text{ and }R\neq 0\\I\neq 0\text{, }&R=0\text{ and }U=0\end{matrix}\right.$$

Steps for Solving Linear Equation

Variable I cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by I.

$$RI=U$$

Divide both sides by R.

$$\frac{RI}{R}=\frac{U}{R}$$

Dividing by R undoes the multiplication by R.

$$I=\frac{U}{R}$$

Variable I cannot be equal to 0.

$$I=\frac{U}{R}\text{, }I\neq 0$$

Solve for R

$$R=\frac{U}{I}$$

$$I\neq 0$$