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Simplifying 9x + 5(4 + 8x) = 0 9x + (4 * 5 + 8x * 5) = 0 9x + (20 + 40x) = 0 Reorder the terms: 20 + 9x + 40x = 0 Combine like terms: 9x + 40x = 49x 20 + 49x = 0 Solving 20 + 49x = 0 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 + 49x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + 49x = 0 + -20 49x = 0 + -20 Combine like terms: 0 + -20 = -20 49x = -20 Divide each side by '49'. x = -0.4081632653 Simplifying x = -0.4081632653

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