Which of the following is an example of an inconsistent system?
x+y=2,2x+2y=4x+y=2, 2x+2y=4x+y=2,2x+2y=4
x+y=2,x−y=0x+y=2, x-y=0x+y=2,x−y=0
x+y=2,x+y=3x+y=2, x+y=3x+y=2,x+y=3
x=1,y=2x=1, y=2x=1,y=2