3x−4y−12=03 x-4 y-12=03x−4y−12=0
4x−3y+12=04 x-3 y+12=04x−3y+12=0
4x+3y+12=04 x+3 y+12=04x+3y+12=0
3x+4y+12=03 x+4 y+12=03x+4y+12=0
3x+4y−12=03 x+4 y-12=03x+4y−12=0