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Simplifying 171 = -3x + 6(-3x + 4) Reorder the terms: 171 = -3x + 6(4 + -3x) 171 = -3x + (4 * 6 + -3x * 6) 171 = -3x + (24 + -18x) Reorder the terms: 171 = 24 + -3x + -18x Combine like terms: -3x + -18x = -21x 171 = 24 + -21x Solving 171 = 24 + -21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21x' to each side of the equation. 171 + 21x = 24 + -21x + 21x Combine like terms: -21x + 21x = 0 171 + 21x = 24 + 0 171 + 21x = 24 Add '-171' to each side of the equation. 171 + -171 + 21x = 24 + -171 Combine like terms: 171 + -171 = 0 0 + 21x = 24 + -171 21x = 24 + -171 Combine like terms: 24 + -171 = -147 21x = -147 Divide each side by '21'. x = -7 Simplifying x = -7
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