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Simplifying 2(x + -5) = 21 Reorder the terms: 2(-5 + x) = 21 (-5 * 2 + x * 2) = 21 (-10 + 2x) = 21 Solving -10 + 2x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + 2x = 21 + 10 Combine like terms: -10 + 10 = 0 0 + 2x = 21 + 10 2x = 21 + 10 Combine like terms: 21 + 10 = 31 2x = 31 Divide each side by '2'. x = 15.5 Simplifying x = 15.5
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