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Simplifying x = (n + 3)(n + 12) Reorder the terms: x = (3 + n)(n + 12) Reorder the terms: x = (3 + n)(12 + n) Multiply (3 + n) * (12 + n) x = (3(12 + n) + n(12 + n)) x = ((12 * 3 + n * 3) + n(12 + n)) x = ((36 + 3n) + n(12 + n)) x = (36 + 3n + (12 * n + n * n)) x = (36 + 3n + (12n + n2)) Combine like terms: 3n + 12n = 15n x = (36 + 15n + n2) Solving x = 36 + 15n + n2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Simplifying x = 36 + 15n + n2
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