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Simplifying 2(10 + x) = 42 (10 * 2 + x * 2) = 42 (20 + 2x) = 42 Solving 20 + 2x = 42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 2x = 42 + -20 Combine like terms: 20 + -20 = 0 0 + 2x = 42 + -20 2x = 42 + -20 Combine like terms: 42 + -20 = 22 2x = 22 Divide each side by '2'. x = 11 Simplifying x = 11
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