Найдите число, если: 1) 1/2 = 42, 2) 2/5 = 42, 3) 3/4 = 42, 4) 7/11 = 42, 5) 21/23 = 42.

1) x * (1/2) = 42, значит x = 42 * 2 = 84. 2) x * (2/5) = 42, значит x = 42 * (5/2) = 105. 3) x * (3/4) = 42, значит x = 42 * (4/3) = 56. 4) x * (7/11) = 42, значит x = 42 * (11/7) = 66. 5) x * (21/23) = 42, значит x = 42 * (23/21) = 46.