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Simplifying (N + 1) + N + (N + -1) = 84 Reorder the terms: (1 + N) + N + (N + -1) = 84 Remove parenthesis around (1 + N) 1 + N + N + (N + -1) = 84 Reorder the terms: 1 + N + N + (-1 + N) = 84 Remove parenthesis around (-1 + N) 1 + N + N + -1 + N = 84 Reorder the terms: 1 + -1 + N + N + N = 84 Combine like terms: 1 + -1 = 0 0 + N + N + N = 84 N + N + N = 84 Combine like terms: N + N = 2N 2N + N = 84 Combine like terms: 2N + N = 3N 3N = 84 Solving 3N = 84 Solving for variable 'N'. Move all terms containing N to the left, all other terms to the right. Divide each side by '3'. N = 28 Simplifying N = 28
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