Solve c/r=2pi

$$\frac { c } { r } = 2 \pi$$

Solve for r

$$r=\frac{c}{2\pi }$$

$$c\neq 0$$

Steps for Solving Linear Equation

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

$$c=2\pi r$$

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

$$2\pi r=c$$

Divide both sides by 2\pi .

$$\frac{2\pi r}{2\pi }=\frac{c}{2\pi }$$

Dividing by 2\pi undoes the multiplication by 2\pi .

$$r=\frac{c}{2\pi }$$

Variable r cannot be equal to 0.

$$r=\frac{c}{2\pi }\text{, }r\neq 0$$

Solve for c

$$c=2\pi r$$

$$r\neq 0$$

Solution Steps

Multiply both sides of the equation by r.

$$c=2\pi r$$