Question 22682
11y-7y = 5 + 4y -6
Subtract 7y from 11y to get 4y.
Subtract 6 from 5 to get -1
  4y   = -1 + 4y
Subtract 4y from each side of the equal sign to get
  0  =  -1
That is a contradiction which came about because we 
assumed the "y" was some specific number.  It is NOT.
There is no solution.

Cheers,
Stan H.