1/x+1/(x+4)=14/45

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Solution for 1/x+1/(x+4)=14/45 equation:


D( x )

x+4 = 0

x = 0

x+4 = 0

x+4 = 0

x+4 = 0 // - 4

x = -4

x = 0

x = 0

x in (-oo:-4) U (-4:0) U (0:+oo)

1/(x+4)+1/x = 14/45 // - 14/45

1/(x+4)+1/x-(14/45) = 0

1/(x+4)+1/x-14/45 = 0

(1*45*x)/(45*x*(x+4))+(1*45*(x+4))/(45*x*(x+4))+(-14*x*(x+4))/(45*x*(x+4)) = 0

1*45*(x+4)-14*x*(x+4)+1*45*x = 0

90*x-14*x^2-56*x+180 = 0

34*x-14*x^2+180 = 0

34*x-14*x^2+180 = 0

2*(17*x-7*x^2+90) = 0

17*x-7*x^2+90 = 0

DELTA = 17^2-(-7*4*90)

DELTA = 2809

DELTA > 0

x = (2809^(1/2)-17)/(-7*2) or x = (-2809^(1/2)-17)/(-7*2)

x = -18/7 or x = 5

2*(x+18/7)*(x-5) = 0

(2*(x+18/7)*(x-5))/(45*x*(x+4)) = 0

(2*(x+18/7)*(x-5))/(45*x*(x+4)) = 0 // * 45*x*(x+4)

2*(x+18/7)*(x-5) = 0

( x+18/7 )

x+18/7 = 0 // - 18/7

x = -18/7

( x-5 )

x-5 = 0 // + 5

x = 5

x in { -18/7, 5 }

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