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If you mean: 6/n times 5/n-1 = 1/3

Then: 30/n2-n = 1/3

Multiplying both sides by n2-n: 30 = n2-n/3

Multiplying both sides by 3: 90 = n2-n

Subtracting 90 from both sides: 0 = n2-n-90 or n2-n-90 = 0

Solving the above quadratic equation: n = -9 or n =10

If n is of a material value its more likely to be 10

Note that n2 means n squared

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9y ago

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