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Simplifying (6x + -7x2 + 9) + -1(7x3 + -12x2 + 9x + -4) = 0 Reorder the terms: (9 + 6x + -7x2) + -1(7x3 + -12x2 + 9x + -4) = 0 Remove parenthesis around (9 + 6x + -7x2) 9 + 6x + -7x2 + -1(7x3 + -12x2 + 9x + -4) = 0 Reorder the terms: 9 + 6x + -7x2 + -1(-4 + 9x + -12x2 + 7x3) = 0 9 + 6x + -7x2 + (-4 * -1 + 9x * -1 + -12x2 * -1 + 7x3 * -1) = 0 9 + 6x + -7x2 + (4 + -9x + 12x2 + -7x3) = 0 Reorder the terms: 9 + 4 + 6x + -9x + -7x2 + 12x2 + -7x3 = 0 Combine like terms: 9 + 4 = 13 13 + 6x + -9x + -7x2 + 12x2 + -7x3 = 0 Combine like terms: 6x + -9x = -3x 13 + -3x + -7x2 + 12x2 + -7x3 = 0 Combine like terms: -7x2 + 12x2 = 5x2 13 + -3x + 5x2 + -7x3 = 0 Solving 13 + -3x + 5x2 + -7x3 = 0 Solving for variable 'x'. The solution to this equation could not be determined.
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