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Simplifying 20 = 2(x + 1) Reorder the terms: 20 = 2(1 + x) 20 = (1 * 2 + x * 2) 20 = (2 + 2x) Solving 20 = 2 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 20 + -2x = 2 + 2x + -2x Combine like terms: 2x + -2x = 0 20 + -2x = 2 + 0 20 + -2x = 2 Add '-20' to each side of the equation. 20 + -20 + -2x = 2 + -20 Combine like terms: 20 + -20 = 0 0 + -2x = 2 + -20 -2x = 2 + -20 Combine like terms: 2 + -20 = -18 -2x = -18 Divide each side by '-2'. x = 9 Simplifying x = 9
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