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Simplifying 9(n + 7) = 81 Reorder the terms: 9(7 + n) = 81 (7 * 9 + n * 9) = 81 (63 + 9n) = 81 Solving 63 + 9n = 81 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-63' to each side of the equation. 63 + -63 + 9n = 81 + -63 Combine like terms: 63 + -63 = 0 0 + 9n = 81 + -63 9n = 81 + -63 Combine like terms: 81 + -63 = 18 9n = 18 Divide each side by '9'. n = 2 Simplifying n = 2
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