4/x=20/40

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Solution for 4/x=20/40 equation: 


D( x )

x = 0

x = 0

x = 0

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

4/x = 20/40 // - 20/40

4/x-(20/40) = 0

4/x-1/2 = 0

4*x^-1 = 1/2 // : 4

x^-1 = 1/8

-1 < 0

1/(x^1) = 1/8 // * x^1

1 = 1/8*x^1 // : 1/8

8 = x^1

x = 8

x = 8

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