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Simplifying 2x + 1 = 4 + 9 Reorder the terms: 1 + 2x = 4 + 9 Combine like terms: 4 + 9 = 13 1 + 2x = 13 Solving 1 + 2x = 13 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 + 2x = 13 + -1 Combine like terms: 1 + -1 = 0 0 + 2x = 13 + -1 2x = 13 + -1 Combine like terms: 13 + -1 = 12 2x = 12 Divide each side by '2'. x = 6 Simplifying x = 6

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