3(5-1/x)-1=8

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Solution for 3(5-1/x)-1=8 equation: 


D( x )

x = 0

x = 0

x = 0

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

3*(5-(1/x))-1 = 8 // - 8

3*(5-(1/x))-8-1 = 0

3*(5-x^-1)-8-1 = 0

3*(5-x^-1)-8-1 = 0

7-3*x^-1-1 = 0

6-3*x^-1 = 0

6-3*x^-1 = 0

-3*x^-1 = -6 // : -3

x^-1 = 2

-1 < 0

1/(x^1) = 2 // * x^1

1 = 2*x^1 // : 2

1/2 = x^1

x = 1/2

x = 1/2

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