20=k(0.15)2

Solution for 20=k(0.15)2 equation:

Simplifying
20 = k(0.15) * 2

Reorder the terms for easier multiplication:
20 = 0.15 * 2k

Multiply 0.15 * 2
20 = 0.3k

Solving
20 = 0.3k

Solving for variable 'k'.

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

Add '-0.3k' to each side of the equation.
20 + -0.3k = 0.3k + -0.3k

Combine like terms: 0.3k + -0.3k = 0.0
20 + -0.3k = 0.0

Add '-20' to each side of the equation.
20 + -20 + -0.3k = 0.0 + -20

Combine like terms: 20 + -20 = 0
0 + -0.3k = 0.0 + -20
-0.3k = 0.0 + -20

Combine like terms: 0.0 + -20 = -20
-0.3k = -20

Divide each side by '-0.3'.
k = 66.66666667

Simplifying
k = 66.66666667