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Simplifying 0 = 3x3 + -21x + -18 Reorder the terms: 0 = -18 + -21x + 3x3 Solving 0 = -18 + -21x + 3x3 Solving for variable 'x'. Combine like terms: 0 + 18 = 18 18 + 21x + -3x3 = -18 + -21x + 3x3 + 18 + 21x + -3x3 Reorder the terms: 18 + 21x + -3x3 = -18 + 18 + -21x + 21x + 3x3 + -3x3 Combine like terms: -18 + 18 = 0 18 + 21x + -3x3 = 0 + -21x + 21x + 3x3 + -3x3 18 + 21x + -3x3 = -21x + 21x + 3x3 + -3x3 Combine like terms: -21x + 21x = 0 18 + 21x + -3x3 = 0 + 3x3 + -3x3 18 + 21x + -3x3 = 3x3 + -3x3 Combine like terms: 3x3 + -3x3 = 0 18 + 21x + -3x3 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(6 + 7x + -1x3) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(6 + 7x + -1x3)' equal to zero and attempt to solve: Simplifying 6 + 7x + -1x3 = 0 Solving 6 + 7x + -1x3 = 0 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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