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Simplifying 84 = -3(3n + -4) Reorder the terms: 84 = -3(-4 + 3n) 84 = (-4 * -3 + 3n * -3) 84 = (12 + -9n) Solving 84 = 12 + -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. 84 + 9n = 12 + -9n + 9n Combine like terms: -9n + 9n = 0 84 + 9n = 12 + 0 84 + 9n = 12 Add '-84' to each side of the equation. 84 + -84 + 9n = 12 + -84 Combine like terms: 84 + -84 = 0 0 + 9n = 12 + -84 9n = 12 + -84 Combine like terms: 12 + -84 = -72 9n = -72 Divide each side by '9'. n = -8 Simplifying n = -8
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