15/x=20/40

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Solution for 15/x=20/40 equation: 


D( x )

x = 0

x = 0

x = 0

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

15/x = 20/40 // - 20/40

15/x-(20/40) = 0

15/x-1/2 = 0

15*x^-1 = 1/2 // : 15

x^-1 = 1/30

-1 < 0

1/(x^1) = 1/30 // * x^1

1 = 1/30*x^1 // : 1/30

30 = x^1

x = 30

x = 30

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