5/0.4=15/x

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Solution for 5/0.4=15/x equation: 


D( x )

x = 0

x = 0

x = 0

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

5/0.4 = 15/x // - 15/x

5/0.4-(15/x) = 0

5/0.4-15*x^-1 = 0

-15*x^-1 = -12.5 // : -15

x^-1 = 0.83333333

-1 < 0

1/(x^1) = 0.83333333 // * x^1

1 = 0.83333333*x^1 // : 0.83333333

1.2 = x^1

x = 1.2

x = 1.2

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