9x^2-xy+y^2-81=

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


Simplifying
9x2 + -1xy + y2 + -81 = 0

Reorder the terms:
-81 + -1xy + 9x2 + y2 = 0

Solving
-81 + -1xy + 9x2 + y2 = 0

Solving for variable 'x'.

The solution to this equation could not be determined.

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