Help, ajutor, din suflet, faceti pe care o stiti

(2x+1)/3=(x-3)/6-(x+3)/4+(2x+1)/12
4(2x+1)/12=2(x-3)/12-3(x+3)/12+(2x+1)/12
4(2x+1)=2(x-3)-3(x+3)+2x+1
8x+4=2x-6-3x-9+2x+1
8x+4=x-14
8x-x= -14-4
7x= -18
x= -18/7