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Simplifying (n + -1) + n + (n + 1) = 3n Reorder the terms: (-1 + n) + n + (n + 1) = 3n Remove parenthesis around (-1 + n) -1 + n + n + (n + 1) = 3n Reorder the terms: -1 + n + n + (1 + n) = 3n Remove parenthesis around (1 + n) -1 + n + n + 1 + n = 3n Reorder the terms: -1 + 1 + n + n + n = 3n Combine like terms: -1 + 1 = 0 0 + n + n + n = 3n n + n + n = 3n Combine like terms: n + n = 2n 2n + n = 3n Combine like terms: 2n + n = 3n 3n = 3n Add '-3n' to each side of the equation. 3n + -3n = 3n + -3n Combine like terms: 3n + -3n = 0 0 = 3n + -3n Combine like terms: 3n + -3n = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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