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Simplifying n + (16 + -1n + 5) = 21 Reorder the terms: n + (16 + 5 + -1n) = 21 Combine like terms: 16 + 5 = 21 n + (21 + -1n) = 21 Remove parenthesis around (21 + -1n) n + 21 + -1n = 21 Reorder the terms: 21 + n + -1n = 21 Combine like terms: n + -1n = 0 21 + 0 = 21 21 = 21 Add '-21' to each side of the equation. 21 + -21 = 21 + -21 Combine like terms: 21 + -21 = 0 0 = 21 + -21 Combine like terms: 21 + -21 = 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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