90/30=60/n

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Solution for 90/30=60/n equation: 


D( n )

n = 0

n = 0

n = 0

n in (-oo:0) U (0:+oo)

90/30 = 60/n // - 60/n

90/30-(60/n) = 0

90/30-60*n^-1 = 0

-60*n^-1 = -3 // : -60

n^-1 = 1/20

-1 < 0

1/(n^1) = 1/20 // * n^1

1 = 1/20*n^1 // : 1/20

20 = n^1

n = 20

n = 20

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