7/5=9/n

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Solution for 7/5=9/n equation: 


D( n )

n = 0

n = 0

n = 0

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

7/5 = 9/n // - 9/n

7/5-(9/n) = 0

7/5-9*n^-1 = 0

-9*n^-1 = -7/5 // : -9

n^-1 = 7/45

-1 < 0

1/(n^1) = 7/45 // * n^1

1 = 7/45*n^1 // : 7/45

45/7 = n^1

n = 45/7

n = 45/7

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