Question 51359
U mean 

[(3x+11)/6]-[(2x+1)/3]=x+5
  [3x+11-2(2x+1)]/6 = x+5
   3x+11-4x-2  = 6(x+5)=6x+30
   3x-4x-6x    = 30+2-11
        -7x    = 21
          x    = 21/-7
               =  -3