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Simplifying -3(x + 4) + -9 = -2x + 12 Reorder the terms: -3(4 + x) + -9 = -2x + 12 (4 * -3 + x * -3) + -9 = -2x + 12 (-12 + -3x) + -9 = -2x + 12 Reorder the terms: -12 + -9 + -3x = -2x + 12 Combine like terms: -12 + -9 = -21 -21 + -3x = -2x + 12 Reorder the terms: -21 + -3x = 12 + -2x Solving -21 + -3x = 12 + -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. -21 + -3x + 2x = 12 + -2x + 2x Combine like terms: -3x + 2x = -1x -21 + -1x = 12 + -2x + 2x Combine like terms: -2x + 2x = 0 -21 + -1x = 12 + 0 -21 + -1x = 12 Add '21' to each side of the equation. -21 + 21 + -1x = 12 + 21 Combine like terms: -21 + 21 = 0 0 + -1x = 12 + 21 -1x = 12 + 21 Combine like terms: 12 + 21 = 33 -1x = 33 Divide each side by '-1'. x = -33 Simplifying x = -33
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