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D( x )
14-(3*x) = 0
5*x+4 = 0
14-(3*x) = 0
14-(3*x) = 0
14-3*x = 0
14-3*x = 0 // - 14
-3*x = -14 // : -3
x = -14/(-3)
x = 14/3
5*x+4 = 0
5*x+4 = 0
5*x+4 = 0 // - 4
5*x = -4 // : 5
x = -4/5
x in (-oo:-4/5) U (-4/5:14/3) U (14/3:+oo)
1/(14-(3*x)) = 2/(5*x+4) // - 2/(5*x+4)
1/(14-(3*x))-(2/(5*x+4)) = 0
1/(14-3*x)-2*(5*x+4)^-1 = 0
1/(14-3*x)-2/(5*x+4) = 0
(1*(5*x+4))/((14-3*x)*(5*x+4))+(-2*(14-3*x))/((14-3*x)*(5*x+4)) = 0
1*(5*x+4)-2*(14-3*x) = 0
11*x-24 = 0
(11*x-24)/((14-3*x)*(5*x+4)) = 0
(11*x-24)/((14-3*x)*(5*x+4)) = 0 // * (14-3*x)*(5*x+4)
11*x-24 = 0
11*x-24 = 0 // + 24
11*x = 24 // : 11
x = 24/11
x = 24/11
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