(c-21)2=27

Solution for (c-21)2=27 equation:

Simplifying
(c + -21) * 2 = 27

Reorder the terms:
(-21 + c) * 2 = 27

Reorder the terms for easier multiplication:
2(-21 + c) = 27
(-21 * 2 + c * 2) = 27
(-42 + 2c) = 27

Solving
-42 + 2c = 27

Solving for variable 'c'.

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

Add '42' to each side of the equation.
-42 + 42 + 2c = 27 + 42

Combine like terms: -42 + 42 = 0
0 + 2c = 27 + 42
2c = 27 + 42

Combine like terms: 27 + 42 = 69
2c = 69

Divide each side by '2'.
c = 34.5

Simplifying
c = 34.5