-2.5/5=4.5/n

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Solution for -2.5/5=4.5/n equation: 


D( n )

n = 0

n = 0

n = 0

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

-2.5/5 = 4.5/n // - 4.5/n

-(4.5/n)-2.5/5 = 0

-4.5*n^-1-2.5/5 = 0

-4.5*n^-1 = 0.5 // : -4.5

n^-1 = -0.11111111

-1 < 0

1/(n^1) = -0.11111111 // * n^1

1 = -0.11111111*n^1 // : -0.11111111

-9.00000009 = n^1

n = -9.00000009

n = -9.00000009

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