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Simplifying x + 2x + 1 = 0 Reorder the terms: 1 + x + 2x = 0 Combine like terms: x + 2x = 3x 1 + 3x = 0 Solving 1 + 3x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 3x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 3x = 0 + -1 3x = 0 + -1 Combine like terms: 0 + -1 = -1 3x = -1 Divide each side by '3'. x = -0.3333333333 Simplifying x = -0.3333333333
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