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Simplifying n + (2n + -3) = 81 Reorder the terms: n + (-3 + 2n) = 81 Remove parenthesis around (-3 + 2n) n + -3 + 2n = 81 Reorder the terms: -3 + n + 2n = 81 Combine like terms: n + 2n = 3n -3 + 3n = 81 Solving -3 + 3n = 81 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + 3n = 81 + 3 Combine like terms: -3 + 3 = 0 0 + 3n = 81 + 3 3n = 81 + 3 Combine like terms: 81 + 3 = 84 3n = 84 Divide each side by '3'. n = 28 Simplifying n = 28
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