Step-by-step explanation:
B) -1
The 'x' value =-1 and y =-7
The solution of the given system of equations
(-1,-7)
 Â
Step-by-step explanation:
Step(i)
Given that the system of equations
        x-y = 6 ..(i)
        y = 2x -5 ..(ii)
By using substitution method,
substitute y=2x-5 in equation (i) , we get
    x -(2x-5) =6
   x -2x+5 =6
     -x = 6-5
     -x =1
      x=-1
Step(ii):-
Put x=-1 in equation (ii) , we get
   y = 2(-1) -5 = -2-5 =-7
The solution of the given system of equations
(-1,-7)