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Simplifying (x + -1) * x(x + 1) = 80 Reorder the terms: (-1 + x) * x(x + 1) = 80 Reorder the terms: (-1 + x) * x(1 + x) = 80 Reorder the terms for easier multiplication: x(-1 + x)(1 + x) = 80 Multiply (-1 + x) * (1 + x) x(-1(1 + x) + x(1 + x)) = 80 x((1 * -1 + x * -1) + x(1 + x)) = 80 x((-1 + -1x) + x(1 + x)) = 80 x(-1 + -1x + (1 * x + x * x)) = 80 x(-1 + -1x + (1x + x2)) = 80 Combine like terms: -1x + 1x = 0 x(-1 + 0 + x2) = 80 x(-1 + x2) = 80 (-1 * x + x2 * x) = 80 (-1x + x3) = 80 Solving -1x + x3 = 80 Solving for variable 'x'. Reorder the terms: -80 + -1x + x3 = 80 + -80 Combine like terms: 80 + -80 = 0 -80 + -1x + x3 = 0 The solution to this equation could not be determined.
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