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