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Simplifying x * 2 + x = 387 Reorder the terms for easier multiplication: 2x + x = 387 Combine like terms: 2x + x = 3x 3x = 387 Solving 3x = 387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '3'. x = 129 Simplifying x = 129
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