12 7/23 - (6 18/23 - t) = 3 21/23 + 5 19/23
12 7/23 - 6 18/23 + t = 3 21/23 + 5 19/23
t = 3 21/23 + 5 19/23 - 12 7/23 + 6 18/23
t = (3 +5 - 12 + 6) + (21/23 + 19/23 - 7/23 +18/23) = 6 + 51/23 = 6 + 2 5/23 = 8 5/23
А) a = 2*2*3; 1, 2, 3, 4, 6, 12
б) a = 3*5*7; 1, 3, 5, 7, 15, 21, 35, 105
в) a = 3*3*11; 1, 3, 9, 11, 33, 99
г) a = 5*5*7*13; 1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 2275