khan academy please please help

-7x-6y=4

      x=-3+8 

x = 5

And

-7(5) - 6y  = 4

-35 - 6y  = 4     add 35 to both sides

-6y  = 39          divide both sides by -6

y =-39/6  =  -13/2

x = 5   y  = -13/2