30/40=27/x

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Solution for 30/40=27/x equation: 


D( x )

x = 0

x = 0

x = 0

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

30/40 = 27/x // - 27/x

30/40-(27/x) = 0

30/40-27*x^-1 = 0

-27*x^-1 = -3/4 // : -27

x^-1 = 1/36

-1 < 0

1/(x^1) = 1/36 // * x^1

1 = 1/36*x^1 // : 1/36

36 = x^1

x = 36

x = 36

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