x^2+9y^2+9z^2=81

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Solution for x^2+9y^2+9z^2=81 equation: 


Simplifying
x2 + 9y2 + 9z2 = 81

Solving
x2 + 9y2 + 9z2 = 81

Solving for variable 'x'.

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

Add '-9y2' to each side of the equation.
x2 + 9y2 + -9y2 + 9z2 = 81 + -9y2

Combine like terms: 9y2 + -9y2 = 0
x2 + 0 + 9z2 = 81 + -9y2
x2 + 9z2 = 81 + -9y2

Add '-9z2' to each side of the equation.
x2 + 9z2 + -9z2 = 81 + -9y2 + -9z2

Combine like terms: 9z2 + -9z2 = 0
x2 + 0 = 81 + -9y2 + -9z2
x2 = 81 + -9y2 + -9z2

Simplifying
x2 = 81 + -9y2 + -9z2

Reorder the terms:
-81 + x2 + 9y2 + 9z2 = 81 + -9y2 + -9z2 + -81 + 9y2 + 9z2

Reorder the terms:
-81 + x2 + 9y2 + 9z2 = 81 + -81 + -9y2 + 9y2 + -9z2 + 9z2

Combine like terms: 81 + -81 = 0
-81 + x2 + 9y2 + 9z2 = 0 + -9y2 + 9y2 + -9z2 + 9z2
-81 + x2 + 9y2 + 9z2 = -9y2 + 9y2 + -9z2 + 9z2

Combine like terms: -9y2 + 9y2 = 0
-81 + x2 + 9y2 + 9z2 = 0 + -9z2 + 9z2
-81 + x2 + 9y2 + 9z2 = -9z2 + 9z2

Combine like terms: -9z2 + 9z2 = 0
-81 + x2 + 9y2 + 9z2 = 0

The solution to this equation could not be determined.

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