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