2x+y+7=02x+y+7 = 02x+y+7=0
3x−2y+13=03x - 2y + 13 = 03x−2y+13=0
2x−3y+13=02x - 3y + 13 = 02x−3y+13=0
2x+3y+13=02x+3y+13 = 02x+3y+13=0