x^2+81=x^2+2x+2

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Solution for x^2+81=x^2+2x+2 equation:


Simplifying
x2 + 81 = x2 + 2x + 2

Reorder the terms:
81 + x2 = x2 + 2x + 2

Reorder the terms:
81 + x2 = 2 + 2x + x2

Add '-1x2' to each side of the equation.
81 + x2 + -1x2 = 2 + 2x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
81 + 0 = 2 + 2x + x2 + -1x2
81 = 2 + 2x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
81 = 2 + 2x + 0
81 = 2 + 2x

Solving
81 = 2 + 2x

Solving for variable 'x'.

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

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

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

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

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

Combine like terms: 2 + -81 = -79
-2x = -79

Divide each side by '-2'.
x = 39.5

Simplifying
x = 39.5

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