x−2y+10=0x-2 y+10=0x−2y+10=0
x+2y−10=0x+2 y-10=0x+2y−10=0
x+2y+10=0x+2 y+10=0x+2y+10=0
2x−y−10=02 x-y-10=02x−y−10=0