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Simplifying
2x2 = 81
Solving
2x2 = 81
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '2'.
x2 = 40.5
Simplifying
x2 = 40.5
Take the square root of each side:
x = {-6.363961031, 6.363961031}
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