Question 87800

       50.  a+4/2 = a+4/a    4/2 = a+4/a-a   4/2=4/a  (a,-a gets cancelled)
       
      therefore a=4.2/4  a=2
       
       64.   4w-1/3w+6-w-1/3=w-1/w+2        
             4w-1/3w-w-w+1/w=2-6
             4w-2w+2/3w=-4   2w+2/3w=-4             
                    w+1/w=-2  w^2+2w+1=0  factorising we get (w+1)^2=0 w=-1,-1
              therefore the value of w=-1,-1