(x-20)2=256

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Solution for (x-20)2=256 equation:


Simplifying
(x + -20) * 2 = 256

Reorder the terms:
(-20 + x) * 2 = 256

Reorder the terms for easier multiplication:
2(-20 + x) = 256
(-20 * 2 + x * 2) = 256
(-40 + 2x) = 256

Solving
-40 + 2x = 256

Solving for variable 'x'.

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

Add '40' to each side of the equation.
-40 + 40 + 2x = 256 + 40

Combine like terms: -40 + 40 = 0
0 + 2x = 256 + 40
2x = 256 + 40

Combine like terms: 256 + 40 = 296
2x = 296

Divide each side by '2'.
x = 148

Simplifying
x = 148

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