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Simplifying 4y2 + -5x2 = 81 Reorder the terms: -5x2 + 4y2 = 81 Solving -5x2 + 4y2 = 81 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4y2' to each side of the equation. -5x2 + 4y2 + -4y2 = 81 + -4y2 Combine like terms: 4y2 + -4y2 = 0 -5x2 + 0 = 81 + -4y2 -5x2 = 81 + -4y2 Divide each side by '-5'. x2 = -16.2 + 0.8y2 Simplifying x2 = -16.2 + 0.8y2 Reorder the terms: 16.2 + x2 + -0.8y2 = -16.2 + 0.8y2 + 16.2 + -0.8y2 Reorder the terms: 16.2 + x2 + -0.8y2 = -16.2 + 16.2 + 0.8y2 + -0.8y2 Combine like terms: -16.2 + 16.2 = 0.0 16.2 + x2 + -0.8y2 = 0.0 + 0.8y2 + -0.8y2 16.2 + x2 + -0.8y2 = 0.8y2 + -0.8y2 Combine like terms: 0.8y2 + -0.8y2 = 0.0 16.2 + x2 + -0.8y2 = 0.0 The solution to this equation could not be determined.
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