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Simplifying -9(7n + 7) = 0 Reorder the terms: -9(7 + 7n) = 0 (7 * -9 + 7n * -9) = 0 (-63 + -63n) = 0 Solving -63 + -63n = 0 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '63' to each side of the equation. -63 + 63 + -63n = 0 + 63 Combine like terms: -63 + 63 = 0 0 + -63n = 0 + 63 -63n = 0 + 63 Combine like terms: 0 + 63 = 63 -63n = 63 Divide each side by '-63'. n = -1 Simplifying n = -1
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