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Simplifying -1(x + 12) = 2x + -9 Reorder the terms: -1(12 + x) = 2x + -9 (12 * -1 + x * -1) = 2x + -9 (-12 + -1x) = 2x + -9 Reorder the terms: -12 + -1x = -9 + 2x Solving -12 + -1x = -9 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. -12 + -1x + -2x = -9 + 2x + -2x Combine like terms: -1x + -2x = -3x -12 + -3x = -9 + 2x + -2x Combine like terms: 2x + -2x = 0 -12 + -3x = -9 + 0 -12 + -3x = -9 Add '12' to each side of the equation. -12 + 12 + -3x = -9 + 12 Combine like terms: -12 + 12 = 0 0 + -3x = -9 + 12 -3x = -9 + 12 Combine like terms: -9 + 12 = 3 -3x = 3 Divide each side by '-3'. x = -1 Simplifying x = -1
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