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Simplifying n + (n + -3) = 54 Reorder the terms: n + (-3 + n) = 54 Remove parenthesis around (-3 + n) n + -3 + n = 54 Reorder the terms: -3 + n + n = 54 Combine like terms: n + n = 2n -3 + 2n = 54 Solving -3 + 2n = 54 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + 2n = 54 + 3 Combine like terms: -3 + 3 = 0 0 + 2n = 54 + 3 2n = 54 + 3 Combine like terms: 54 + 3 = 57 2n = 57 Divide each side by '2'. n = 28.5 Simplifying n = 28.5
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