What is the result of adding 2x−y=42x - y = 42x−y=4 and x+y=2x + y = 2x+y=2?
3x=63x = 63x=6
x=2x = 2x=2
3x−2y=63x - 2y = 63x−2y=6
2x=82x = 82x=8