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Simplifying 12 = -6x + 3(x + -3) Reorder the terms: 12 = -6x + 3(-3 + x) 12 = -6x + (-3 * 3 + x * 3) 12 = -6x + (-9 + 3x) Reorder the terms: 12 = -9 + -6x + 3x Combine like terms: -6x + 3x = -3x 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 = -21 3x = -21 Divide each side by '3'. x = -7 Simplifying x = -7
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