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Simplifying 81 = -3(-6 + 3n) 81 = (-6 * -3 + 3n * -3) 81 = (18 + -9n) Solving 81 = 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. 81 + 9n = 18 + -9n + 9n Combine like terms: -9n + 9n = 0 81 + 9n = 18 + 0 81 + 9n = 18 Add '-81' to each side of the equation. 81 + -81 + 9n = 18 + -81 Combine like terms: 81 + -81 = 0 0 + 9n = 18 + -81 9n = 18 + -81 Combine like terms: 18 + -81 = -63 9n = -63 Divide each side by '9'. n = -7 Simplifying n = -7
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