2x+3y−6=02 x+3 y-6=02x+3y−6=0
3x+2y−6=03 x+2 y-6=03x+2y−6=0
2x+3y+6=02 x+3 y+6=02x+3y+6=0
3x+2y+6=03 x+2 y+6=03x+2y+6=0