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Simplifying 5x2 + -30x + 9 + -20x2 + -25x + 20x2 + 5x + -5x2 = 0 Reorder the terms: 9 + -30x + -25x + 5x + 5x2 + -20x2 + 20x2 + -5x2 = 0 Combine like terms: -30x + -25x = -55x 9 + -55x + 5x + 5x2 + -20x2 + 20x2 + -5x2 = 0 Combine like terms: -55x + 5x = -50x 9 + -50x + 5x2 + -20x2 + 20x2 + -5x2 = 0 Combine like terms: 5x2 + -20x2 = -15x2 9 + -50x + -15x2 + 20x2 + -5x2 = 0 Combine like terms: -15x2 + 20x2 = 5x2 9 + -50x + 5x2 + -5x2 = 0 Combine like terms: 5x2 + -5x2 = 0 9 + -50x + 0 = 0 9 + -50x = 0 Solving 9 + -50x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -50x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -50x = 0 + -9 -50x = 0 + -9 Combine like terms: 0 + -9 = -9 -50x = -9 Divide each side by '-50'. x = 0.18 Simplifying x = 0.18
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