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Simplifying n + n + 20 = 512 Reorder the terms: 20 + n + n = 512 Combine like terms: n + n = 2n 20 + 2n = 512 Solving 20 + 2n = 512 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 2n = 512 + -20 Combine like terms: 20 + -20 = 0 0 + 2n = 512 + -20 2n = 512 + -20 Combine like terms: 512 + -20 = 492 2n = 492 Divide each side by '2'. n = 246 Simplifying n = 246
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