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Simplifying -3x + 2(3x + -9) = -39 Reorder the terms: -3x + 2(-9 + 3x) = -39 -3x + (-9 * 2 + 3x * 2) = -39 -3x + (-18 + 6x) = -39 Reorder the terms: -18 + -3x + 6x = -39 Combine like terms: -3x + 6x = 3x -18 + 3x = -39 Solving -18 + 3x = -39 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + 3x = -39 + 18 Combine like terms: -18 + 18 = 0 0 + 3x = -39 + 18 3x = -39 + 18 Combine like terms: -39 + 18 = -21 3x = -21 Divide each side by '3'. x = -7 Simplifying x = -7
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