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Simplifying x + 2(x + 1) = 20 Reorder the terms: x + 2(1 + x) = 20 x + (1 * 2 + x * 2) = 20 x + (2 + 2x) = 20 Reorder the terms: 2 + x + 2x = 20 Combine like terms: x + 2x = 3x 2 + 3x = 20 Solving 2 + 3x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 3x = 20 + -2 Combine like terms: 2 + -2 = 0 0 + 3x = 20 + -2 3x = 20 + -2 Combine like terms: 20 + -2 = 18 3x = 18 Divide each side by '3'. x = 6 Simplifying x = 6
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