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Simplifying -2x + 5(-2x + 4) = -40 Reorder the terms: -2x + 5(4 + -2x) = -40 -2x + (4 * 5 + -2x * 5) = -40 -2x + (20 + -10x) = -40 Reorder the terms: 20 + -2x + -10x = -40 Combine like terms: -2x + -10x = -12x 20 + -12x = -40 Solving 20 + -12x = -40 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -12x = -40 + -20 Combine like terms: 20 + -20 = 0 0 + -12x = -40 + -20 -12x = -40 + -20 Combine like terms: -40 + -20 = -60 -12x = -60 Divide each side by '-12'. x = 5 Simplifying x = 5
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