-3/x=7+2x

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Solution for -3/x=7+2x equation: 


D( x )

x = 0

x = 0

x = 0

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

-3/x = 2*x+7 // - 2*x+7

-(2*x)-3/x-7 = 0

-2*x-3/x-7 = 0

-2*x^1-3*x^-1-7*x^0 = 0

(-2*x^2-7*x^1-3*x^0)/(x^1) = 0 // * x^2

x^1*(-2*x^2-7*x^1-3*x^0) = 0

x^1

-2*x^2-7*x-3 = 0

-2*x^2-7*x-3 = 0

DELTA = (-7)^2-(-3*(-2)*4)

DELTA = 25

DELTA > 0

x = (25^(1/2)+7)/(-2*2) or x = (7-25^(1/2))/(-2*2)

x = -3 or x = -1/2

x in { -3, -1/2} 

x in { -3, -1/2 }

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