x^2-19=81

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Solution for x^2-19=81 equation: 


Simplifying
x2 + -19 = 81

Reorder the terms:
-19 + x2 = 81

Solving
-19 + x2 = 81

Solving for variable 'x'.

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

Add '19' to each side of the equation.
-19 + 19 + x2 = 81 + 19

Combine like terms: -19 + 19 = 0
0 + x2 = 81 + 19
x2 = 81 + 19

Combine like terms: 81 + 19 = 100
x2 = 100

Simplifying
x2 = 100

Take the square root of each side:
x = {-10, 10}

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