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Simplifying 2x4 + -1x3 + 18x2 + 9 = 0 Reorder the terms: 9 + 18x2 + -1x3 + 2x4 = 0 Solving 9 + 18x2 + -1x3 + 2x4 = 0 Solving for variable 'x'. The solution to this equation could not be determined.
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