-4/x=40

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Solution for -4/x=40 equation: 


D( x )

x = 0

x = 0

x = 0

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

-4/x = 40 // - 40

-4/x-40 = 0

-4*x^-1 = 40 // : -4

x^-1 = -10

-1 < 0

1/(x^1) = -10 // * x^1

1 = -10*x^1 // : -10

-1/10 = x^1

x = -1/10

x = -1/10

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