(K-3)2=121

Solution for (K-3)2=121 equation:

Simplifying
(K + -3) * 2 = 121

Reorder the terms:
(-3 + K) * 2 = 121

Reorder the terms for easier multiplication:
2(-3 + K) = 121
(-3 * 2 + K * 2) = 121
(-6 + 2K) = 121

Solving
-6 + 2K = 121

Solving for variable 'K'.

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

Add '6' to each side of the equation.
-6 + 6 + 2K = 121 + 6

Combine like terms: -6 + 6 = 0
0 + 2K = 121 + 6
2K = 121 + 6

Combine like terms: 121 + 6 = 127
2K = 127

Divide each side by '2'.
K = 63.5

Simplifying
K = 63.5