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Simplifying 3x + 20x + 21 = 0 Reorder the terms: 21 + 3x + 20x = 0 Combine like terms: 3x + 20x = 23x 21 + 23x = 0 Solving 21 + 23x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 23x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 23x = 0 + -21 23x = 0 + -21 Combine like terms: 0 + -21 = -21 23x = -21 Divide each side by '23'. x = -0.9130434783 Simplifying x = -0.9130434783
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