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Simplifying x4 + -3x3 + -20x2 + 84x + -80 = 0 Reorder the terms: -80 + 84x + -20x2 + -3x3 + x4 = 0 Solving -80 + 84x + -20x2 + -3x3 + x4 = 0 Solving for variable 'x'. The solution to this equation could not be determined.
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