You won't have to graph these equations in order to solve them.
Ok, x+2y=6, therefore x=6-2y.
2x+4y=36, so plug the value x (in terms of y) right into this equation.
2(6-2y)+4y=36
12-4y+4y=36. 12 is not equal to 36 so the problem breaks down.
I believe that the answer is B and D