Question 1088341
{{{(6/(7x-21))-(1/(x^2-6x+9))+(1/(x^2-9))=0}}}


{{{(6(x-3)/7(x-3))-(7/(x-3)^2)+(7(x-3)/(x-3)^2(x+3))=0}}}


{{{(6x-18-7)/(7 (x - 3)^2) + (7x-21)/(x-3)^2(x+3))=0}}}


{{{(6x-25)/(7 (x - 3)^2) + (7x-21)/(x-3)^2(x+3))=0}}}


{{{((6x - 25)(x+3))/(7(x+3) (x - 3)^2) + (7x-21)/(x-3)^2(x+3))=0}}}


{{{(6 x^2 - 7 x - 75 + 7x-21)/(x-3)^2(x+3))=0}}}


{{{(6 x^2  - 96 )/(x-3)^2(x+3))=0}}}


{{{6 (x^2 - 16)/(x-3)^2(x+3))=0}}}


{{{x^2 - 16=0}}}


{{{x^2 =16}}}


{{{x =sqrt(16)}}}-> {{{x=4}}} or {{{x=-4}}}