(20/28)+(20/x)=1

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Solution for (20/28)+(20/x)=1 equation: 


D( x )

x = 0

x = 0

x = 0

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

20/x+20/28 = 1 // - 1

20/x+20/28-1 = 0

20*x^-1 = 2/7 // : 20

x^-1 = 1/70

-1 < 0

1/(x^1) = 1/70 // * x^1

1 = 1/70*x^1 // : 1/70

70 = x^1

x = 70

x = 70

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