Let x be the distance he jogged on the SECOND night. Then on the first nigh he jogged x-440 yards, while on the third night he jogged x+440 yards. In total, (x-440) + x + (x+440) = 6000, which gives 3x = 6000, x = 6000/3 = 2000. On the first night, he jogged 2000-440 = 1560 yards. ANSWER