Step-by-step explanation:
The first one is the correct option,
the intersection point of both the lines is the solution of the system, here it is (-1,1)
U can verify it by putting the the coordinate point in both the equations
in equation 2x-y, put the value of x and ycoordinate , 2(-1)-1=-3
again in the equation, x+ y =-1+1= 0
