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Simplifying 9n + 3(n + -2) = -18 Reorder the terms: 9n + 3(-2 + n) = -18 9n + (-2 * 3 + n * 3) = -18 9n + (-6 + 3n) = -18 Reorder the terms: -6 + 9n + 3n = -18 Combine like terms: 9n + 3n = 12n -6 + 12n = -18 Solving -6 + 12n = -18 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + 12n = -18 + 6 Combine like terms: -6 + 6 = 0 0 + 12n = -18 + 6 12n = -18 + 6 Combine like terms: -18 + 6 = -12 12n = -12 Divide each side by '12'. n = -1 Simplifying n = -1
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