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Simplifying -3(5n + 7) = 84 Reorder the terms: -3(7 + 5n) = 84 (7 * -3 + 5n * -3) = 84 (-21 + -15n) = 84 Solving -21 + -15n = 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 + -15n = 84 + 21 Combine like terms: -21 + 21 = 0 0 + -15n = 84 + 21 -15n = 84 + 21 Combine like terms: 84 + 21 = 105 -15n = 105 Divide each side by '-15'. n = -7 Simplifying n = -7
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