1.8/4.5=4/x

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Solution for 1.8/4.5=4/x equation: 


D( x )

x = 0

x = 0

x = 0

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

1.8/4.5 = 4/x // - 4/x

1.8/4.5-(4/x) = 0

1.8/4.5-4*x^-1 = 0

-4*x^-1 = -0.4 // : -4

x^-1 = 0.1

-1 < 0

1/(x^1) = 0.1 // * x^1

1 = 0.1*x^1 // : 0.1

10 = x^1

x = 10

x = 10

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