x^2-63=18

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Solution for x^2-63=18 equation: 


Simplifying
x2 + -63 = 18

Reorder the terms:
-63 + x2 = 18

Solving
-63 + x2 = 18

Solving for variable 'x'.

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

Add '63' to each side of the equation.
-63 + 63 + x2 = 18 + 63

Combine like terms: -63 + 63 = 0
0 + x2 = 18 + 63
x2 = 18 + 63

Combine like terms: 18 + 63 = 81
x2 = 81

Simplifying
x2 = 81

Take the square root of each side:
x = {-9, 9}

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