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Simplifying 5(-4x + -9) = -42 Reorder the terms: 5(-9 + -4x) = -42 (-9 * 5 + -4x * 5) = -42 (-45 + -20x) = -42 Solving -45 + -20x = -42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '45' to each side of the equation. -45 + 45 + -20x = -42 + 45 Combine like terms: -45 + 45 = 0 0 + -20x = -42 + 45 -20x = -42 + 45 Combine like terms: -42 + 45 = 3 -20x = 3 Divide each side by '-20'. x = -0.15 Simplifying x = -0.15
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