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Simplifying -3(7 + -7n) = 84 (7 * -3 + -7n * -3) = 84 (-21 + 21n) = 84 Solving -21 + 21n = 84 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 21n = 84 + 21 Combine like terms: -21 + 21 = 0 0 + 21n = 84 + 21 21n = 84 + 21 Combine like terms: 84 + 21 = 105 21n = 105 Divide each side by '21'. n = 5 Simplifying n = 5
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