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D( x )
3*x = 0
4*x = 0
3*x = 0
3*x = 0
3*x = 0 // : 3
x = 0
4*x = 0
4*x = 0
4*x = 0 // : 4
x = 0
x in (-oo:0) U (0:+oo)
(6*x-9)/(3*x)+1/(3*x) = (3*x-3)/(4*x) // - (3*x-3)/(4*x)
(6*x-9)/(3*x)-((3*x-3)/(4*x))+1/(3*x) = 0
(6*x-9)/(3*x)+(-1*(3*x-3))/(4*x)+1/(3*x) = 0
(4*x*(6*x-9))/(3*4*x*x)+(-1*3*x*(3*x-3))/(3*4*x*x)+(1*4*x)/(3*4*x*x) = 0
4*x*(6*x-9)-1*3*x*(3*x-3)+1*4*x = 0
15*x^2-27*x+4*x = 0
15*x^2-23*x = 0
15*x^2-23*x = 0
x*(15*x-23) = 0
15*x-23 = 0 // + 23
15*x = 23 // : 15
x = 23/15
x*(x-23/15) = 0
(x*(x-23/15))/(3*4*x*x) = 0
(x*(x-23/15))/(3*4*x*x) = 0 // * 3*4*x*x
x*(x-23/15) = 0
( x-23/15 )
x-23/15 = 0 // + 23/15
x = 23/15
( x )
x = 0
x in { 0}
x = 23/15
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