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D( x )
x+3 = 0
x+3 = 0
x+3 = 0
x+3 = 0 // - 3
x = -3
x in (-oo:-3) U (-3:+oo)
(4-(2*x))/(x+3)+2 = 5/p // - 5/p
(4-(2*x))/(x+3)-(5/p)+2 = 0
(4-2*x)/(x+3)-5*p^-1+2 = 0
(4-2*x)/(x+3)-5/p+2 = 0
(p*(4-2*x))/(p*(x+3))+(-5*(x+3))/(p*(x+3))+(2*p*(x+3))/(p*(x+3)) = 0
p*(4-2*x)-5*(x+3)+2*p*(x+3) = 0
4*p-2*p*x+2*p*x+6*p-5*x-15 = 0
10*p-5*x-15 = 0
(10*p-5*x-15)/(p*(x+3)) = 0
(10*p-5*x-15)/(p*(x+3)) = 0 // * p*(x+3)
10*p-5*x-15 = 0
10*p-5*x-15 = 0 // - 10*p-15
-5*x = -(10*p-15) // : -5
x = (-(10*p-15))/(-5)
x = (15-(10*p))/(-5)
x = (15-(10*p))/(-5)
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