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Simplifying 4x2 + 4y2 + -36x + 81 = 0 Reorder the terms: 81 + -36x + 4x2 + 4y2 = 0 Solving 81 + -36x + 4x2 + 4y2 = 0 Solving for variable 'x'. The solution to this equation could not be determined.
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