-8-3x/(x^2-7x)=4x/(14-2x)

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Solution for -8-3x/(x^2-7x)=4x/(14-2x) equation:


D( x )

14-(2*x) = 0

x^2-(7*x) = 0

14-(2*x) = 0

14-(2*x) = 0

14-2*x = 0

14-2*x = 0 // - 14

-2*x = -14 // : -2

x = -14/(-2)

x = 7

x^2-(7*x) = 0

x^2-(7*x) = 0

x^2-7*x = 0

x^2-7*x = 0

DELTA = (-7)^2-(0*1*4)

DELTA = 49

DELTA > 0

x = (49^(1/2)+7)/(1*2) or x = (7-49^(1/2))/(1*2)

x = 7 or x = 0

x in (-oo:0) U (0:7) U (7:+oo)

-((3*x)/(x^2-(7*x)))-8 = (4*x)/(14-(2*x)) // - (4*x)/(14-(2*x))

-((3*x)/(x^2-(7*x)))-((4*x)/(14-(2*x)))-8 = 0

-3*x*(x^2-7*x)^-1-4*x*(14-2*x)^-1-8 = 0

(-3*x)/(x^2-7*x)+(-4*x)/(14-2*x)-8 = 0

x^2-7*x = 0

x^2-7*x = 0

x*(x-7) = 0

x-7 = 0 // + 7

x = 7

x*(x-7) = 0

(-3*x)/(x*(x-7))+(-4*x)/(14-2*x)-8 = 0

(-3*x*(14-2*x))/(x*(x-7)*(14-2*x))+(-4*x*x*(x-7))/(x*(x-7)*(14-2*x))+(-8*x*(x-7)*(14-2*x))/(x*(x-7)*(14-2*x)) = 0

-3*x*(14-2*x)-4*x*x*(x-7)-8*x*(x-7)*(14-2*x) = 0

16*x^3-4*x^3+34*x^2-224*x^2-42*x+784*x = 0

12*x^3-190*x^2+742*x = 0

12*x^3-190*x^2+742*x = 0

2*x*(6*x^2-95*x+371) = 0

6*x^2-95*x+371 = 0

DELTA = (-95)^2-(4*6*371)

DELTA = 121

DELTA > 0

x = (121^(1/2)+95)/(2*6) or x = (95-121^(1/2))/(2*6)

x = 53/6 or x = 7

2*x*(x-7)*(x-53/6) = 0

(2*x*(x-7)*(x-53/6))/(x*(x-7)*(14-2*x)) = 0

(2*x*(x-7)*(x-53/6))/(x*(x-7)*(14-2*x)) = 0 // * x*(x-7)*(14-2*x)

2*x*(x-7)*(x-53/6) = 0

( 2*x )

2*x = 0 // : 2

x = 0

( x-53/6 )

x-53/6 = 0 // + 53/6

x = 53/6

( x-7 )

x-7 = 0 // + 7

x = 7

x in { 0}

x in { 7}

x = 53/6

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