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15-09-2020
Mathematics

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The product of a number and three is four less than 60. Find the number.

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15-09-2020

hii!

n(n-4) = 60

n^2 - 4n - 60 = 0

( n - 10 )(n + 6 ) = 0

n-10 = 0 ---> n = 10 ---> 10*(10-4) = 10*6 = 60

n+6 = 0 --> n = -6 ---> -6 * (-6-4) = -6 * -10 = 60

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