Ответы и объяснения

2015-08-13T09:30:43+00:00
1) d + 1/5 = 4/7 + 3/7 d + 1/5 = 1 d = 1 - 1/5 = 4/5 = 0,8 2) f + 4/5 = 4/7 + 3/7 f + 4/5 = 1 f = 1 - 4/5 = 1/5 = 0,2 3) b + 2/5 = 4/7 + 3/7 b + 2/5 = 1 b = 1 - 2/5 = 3/5 = 0,6