(x-9)2=81

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Solution for (x-9)2=81 equation:


Simplifying
(x + -9) * 2 = 81

Reorder the terms:
(-9 + x) * 2 = 81

Reorder the terms for easier multiplication:
2(-9 + x) = 81
(-9 * 2 + x * 2) = 81
(-18 + 2x) = 81

Solving
-18 + 2x = 81

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + 2x = 81 + 18

Combine like terms: -18 + 18 = 0
0 + 2x = 81 + 18
2x = 81 + 18

Combine like terms: 81 + 18 = 99
2x = 99

Divide each side by '2'.
x = 49.5

Simplifying
x = 49.5

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