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Simplifying -2x + -9 = x + 12 Reorder the terms: -9 + -2x = x + 12 Reorder the terms: -9 + -2x = 12 + x Solving -9 + -2x = 12 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. -9 + -2x + -1x = 12 + x + -1x Combine like terms: -2x + -1x = -3x -9 + -3x = 12 + x + -1x Combine like terms: x + -1x = 0 -9 + -3x = 12 + 0 -9 + -3x = 12 Add '9' to each side of the equation. -9 + 9 + -3x = 12 + 9 Combine like terms: -9 + 9 = 0 0 + -3x = 12 + 9 -3x = 12 + 9 Combine like terms: 12 + 9 = 21 -3x = 21 Divide each side by '-3'. x = -7 Simplifying x = -7
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