Which of these systems is inconsistent (has no solution)?
x+y=2,x−y=0x+y=2, x-y=0x+y=2,x−y=0
x+y=2,2x+2y=4x+y=2, 2x+2y=4x+y=2,2x+2y=4
x+y=2,x+y=3x+y=2, x+y=3x+y=2,x+y=3
y=x,y=2xy=x, y=2xy=x,y=2x