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Simplifying 2 + 3(x + 1) = 21 Reorder the terms: 2 + 3(1 + x) = 21 2 + (1 * 3 + x * 3) = 21 2 + (3 + 3x) = 21 Combine like terms: 2 + 3 = 5 5 + 3x = 21 Solving 5 + 3x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 3x = 21 + -5 Combine like terms: 5 + -5 = 0 0 + 3x = 21 + -5 3x = 21 + -5 Combine like terms: 21 + -5 = 16 3x = 16 Divide each side by '3'. x = 5.333333333 Simplifying x = 5.333333333
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