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Simplifying -3x + 3(-3x + 5) = -81 Reorder the terms: -3x + 3(5 + -3x) = -81 -3x + (5 * 3 + -3x * 3) = -81 -3x + (15 + -9x) = -81 Reorder the terms: 15 + -3x + -9x = -81 Combine like terms: -3x + -9x = -12x 15 + -12x = -81 Solving 15 + -12x = -81 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + -12x = -81 + -15 Combine like terms: 15 + -15 = 0 0 + -12x = -81 + -15 -12x = -81 + -15 Combine like terms: -81 + -15 = -96 -12x = -96 Divide each side by '-12'. x = 8 Simplifying x = 8
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