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Simplifying An = 12 + 3(n + -1) Reorder the terms: nA = 12 + 3(-1 + n) nA = 12 + (-1 * 3 + n * 3) nA = 12 + (-3 + 3n) Combine like terms: 12 + -3 = 9 nA = 9 + 3n Solving nA = 9 + 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. -3n + nA = 9 + 3n + -3n Combine like terms: 3n + -3n = 0 -3n + nA = 9 + 0 -3n + nA = 9 Reorder the terms: -9 + -3n + nA = 9 + -9 Combine like terms: 9 + -9 = 0 -9 + -3n + nA = 0 The solution to this equation could not be determined.
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