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Simplifying n + (n + -2) = 2n + -2 Reorder the terms: n + (-2 + n) = 2n + -2 Remove parenthesis around (-2 + n) n + -2 + n = 2n + -2 Reorder the terms: -2 + n + n = 2n + -2 Combine like terms: n + n = 2n -2 + 2n = 2n + -2 Reorder the terms: -2 + 2n = -2 + 2n Add '2' to each side of the equation. -2 + 2 + 2n = -2 + 2 + 2n Combine like terms: -2 + 2 = 0 0 + 2n = -2 + 2 + 2n 2n = -2 + 2 + 2n Combine like terms: -2 + 2 = 0 2n = 0 + 2n 2n = 2n Add '-2n' to each side of the equation. 2n + -2n = 2n + -2n Combine like terms: 2n + -2n = 0 0 = 2n + -2n Combine like terms: 2n + -2n = 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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