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Simplifying -90 = -3(-3n + 6) Reorder the terms: -90 = -3(6 + -3n) -90 = (6 * -3 + -3n * -3) -90 = (-18 + 9n) Solving -90 = -18 + 9n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-9n' to each side of the equation. -90 + -9n = -18 + 9n + -9n Combine like terms: 9n + -9n = 0 -90 + -9n = -18 + 0 -90 + -9n = -18 Add '90' to each side of the equation. -90 + 90 + -9n = -18 + 90 Combine like terms: -90 + 90 = 0 0 + -9n = -18 + 90 -9n = -18 + 90 Combine like terms: -18 + 90 = 72 -9n = 72 Divide each side by '-9'. n = -8 Simplifying n = -8
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