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Simplifying 3(3n + 7) + 9 + n = -20 Reorder the terms: 3(7 + 3n) + 9 + n = -20 (7 * 3 + 3n * 3) + 9 + n = -20 (21 + 9n) + 9 + n = -20 Reorder the terms: 21 + 9 + 9n + n = -20 Combine like terms: 21 + 9 = 30 30 + 9n + n = -20 Combine like terms: 9n + n = 10n 30 + 10n = -20 Solving 30 + 10n = -20 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + -30 + 10n = -20 + -30 Combine like terms: 30 + -30 = 0 0 + 10n = -20 + -30 10n = -20 + -30 Combine like terms: -20 + -30 = -50 10n = -50 Divide each side by '10'. n = -5 Simplifying n = -5
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