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Simplifying 21x * 2 + -13x + -20 = 0 Reorder the terms for easier multiplication: 21 * 2x + -13x + -20 = 0 Multiply 21 * 2 42x + -13x + -20 = 0 Reorder the terms: -20 + 42x + -13x = 0 Combine like terms: 42x + -13x = 29x -20 + 29x = 0 Solving -20 + 29x = 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 + 29x = 0 + 20 Combine like terms: -20 + 20 = 0 0 + 29x = 0 + 20 29x = 0 + 20 Combine like terms: 0 + 20 = 20 29x = 20 Divide each side by '29'. x = 0.6896551724 Simplifying x = 0.6896551724
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