So I had to solve systems and if the system has an infinite solution set, we had to give three solutions for it. However, I'm not really sure how to get these solutions, please help!

x+y=4(y+2)

x-y=2(y+4)

x+y=4y+8

x-y=2y+8

x-3y=8

x-3y=8

-x+3y=-8

x-3y=8

0=0

Thanks =)