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5/(n - 12) = 10(n + 5) (multiply by the common denominator (n - 120(n + 9) to both sides)
[5/(n - 12)][(n - 12)(n + 9)] = [10(n + 5)][(n - 120)(n + 9)] (simplify)
5(n + 9) = 10(n - 12)
5n + 45 = 10n - 120 (subtract 5n and add 120 to both sides)
5n - 5n + 120 + 45 = 10n - 5n + 120 - 120
165 = 5n (divide by 5 to both sides)
33 = n

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15y ago

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