16=r^2

Solution for 16=r^2 equation:

Simplifying
16 = r2

Solving
16 = r2

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-1r2' to each side of the equation.
16 + -1r2 = r2 + -1r2

Combine like terms: r2 + -1r2 = 0
16 + -1r2 = 0

Add '-16' to each side of the equation.
16 + -16 + -1r2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + -1r2 = 0 + -16
-1r2 = 0 + -16

Combine like terms: 0 + -16 = -16
-1r2 = -16

Divide each side by '-1'.
r2 = 16

Simplifying
r2 = 16

Take the square root of each side:
r = {-4, 4}