15/8=80/x

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Solution for 15/8=80/x equation: 


D( x )

x = 0

x = 0

x = 0

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

15/8 = 80/x // - 80/x

15/8-(80/x) = 0

15/8-80*x^-1 = 0

-80*x^-1 = -15/8 // : -80

x^-1 = 3/128

-1 < 0

1/(x^1) = 3/128 // * x^1

1 = 3/128*x^1 // : 3/128

128/3 = x^1

x = 128/3

x = 128/3

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