6. If 5x + y = 19 and x-3y = 7, then x + y =
(A) 4
(B) -1
(C) 3
(D) 4

if you break down the data from the global footprint network, china exerts far more pressure on its ecosystems per capita than america in terms of crops, grazing, foresting, and fishing. but where america blows everybody out of the water is carbon emissions per capita

answer:

20

explanation:

lol