Literal Equations:

C=2πr solve for r

P=4s solve for s

If you would like to solve the equation C = 2 * π * r for r, you can use the following step:

C = 2 * π * r / 2π

r = C / (2π)

If you would like to solve the equation P = 4 * s for s, you can use the following step:

P = 4 * s / 4

s = P / 4