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D( x )
3*x = 0
7*x = 0
3*x = 0
3*x = 0
3*x = 0 // : 3
x = 0
7*x = 0
7*x = 0
7*x = 0 // : 7
x = 0
x in (-oo:0) U (0:+oo)
(3*x-1)/(7*x)-(2/(3*x)) = 24 // - 24
(3*x-1)/(7*x)-(2/(3*x))-24 = 0
(3*x-1)/(7*x)+(-2/3)*x^-1-24 = 0
(3*x-1)/(7*x)-2/(3*x)-24 = 0
(3*x*(3*x-1))/(3*7*x*x)+(-2*7*x)/(3*7*x*x)+(-24*3*7*x*x)/(3*7*x*x) = 0
3*x*(3*x-1)-24*3*7*x*x-2*7*x = 0
9*x^2-504*x^2-17*x = 0
-495*x^2-17*x = 0
-495*x^2-17*x = 0
-x*(495*x+17) = 0
495*x+17 = 0 // - 17
495*x = -17 // : 495
x = -17/495
-x*(x+17/495) = 0
(-x*(x+17/495))/(3*7*x*x) = 0
(-x*(x+17/495))/(3*7*x*x) = 0 // * 3*7*x*x
-x*(x+17/495) = 0
( -x )
-1*x = 0 // : -1
x = 0
( x+17/495 )
x+17/495 = 0 // - 17/495
x = -17/495
x in { 0}
x = -17/495
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