9/10=4/n

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Solution for 9/10=4/n equation: 


D( n )

n = 0

n = 0

n = 0

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

9/10 = 4/n // - 4/n

9/10-(4/n) = 0

9/10-4*n^-1 = 0

-4*n^-1 = -9/10 // : -4

n^-1 = 9/40

-1 < 0

1/(n^1) = 9/40 // * n^1

1 = 9/40*n^1 // : 9/40

40/9 = n^1

n = 40/9

n = 40/9

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