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Simplifying 39 = N + (N + 1) + (N + 2) Reorder the terms: 39 = N + (1 + N) + (N + 2) Remove parenthesis around (1 + N) 39 = N + 1 + N + (N + 2) Reorder the terms: 39 = N + 1 + N + (2 + N) Remove parenthesis around (2 + N) 39 = N + 1 + N + 2 + N Reorder the terms: 39 = 1 + 2 + N + N + N Combine like terms: 1 + 2 = 3 39 = 3 + N + N + N Combine like terms: N + N = 2N 39 = 3 + 2N + N Combine like terms: 2N + N = 3N 39 = 3 + 3N Solving 39 = 3 + 3N Solving for variable 'N'. Move all terms containing N to the left, all other terms to the right. Add '-3N' to each side of the equation. 39 + -3N = 3 + 3N + -3N Combine like terms: 3N + -3N = 0 39 + -3N = 3 + 0 39 + -3N = 3 Add '-39' to each side of the equation. 39 + -39 + -3N = 3 + -39 Combine like terms: 39 + -39 = 0 0 + -3N = 3 + -39 -3N = 3 + -39 Combine like terms: 3 + -39 = -36 -3N = -36 Divide each side by '-3'. N = 12 Simplifying N = 12
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