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Simplifying -3(3n + 6) = -90 Reorder the terms: -3(6 + 3n) = -90 (6 * -3 + 3n * -3) = -90 (-18 + -9n) = -90 Solving -18 + -9n = -90 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 = -90 + 18 Combine like terms: -18 + 18 = 0 0 + -9n = -90 + 18 -9n = -90 + 18 Combine like terms: -90 + 18 = -72 -9n = -72 Divide each side by '-9'. n = 8 Simplifying n = 8
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