4x+3y+3=04 x+3 y+3=04x+3y+3=0
4x−3y−3=04 x-3 y-3=04x−3y−3=0
3x−4y+3=03 x-4 y+3=03x−4y+3=0
4x+y=04 x+y=04x+y=0