Остаток 0:5,10,15,20,25
Ост. 1:6,11,16,21,26
Ост. 2:7,12,17,22,27
Ост. 3:8,13,18,23,28
Ост. 4:9,14,19,24,29
X+7×4=40
X=40:4
X=10
X=10-7
X=3
(1 (3)/5) - ( 4 (5)/8 - 2,4) : (5)/8
(3)/5 - ( (5)/2 - (12)/5 ) * (8)/5
(3)/5 - (1)/10 * (8)/5
(3)/5 - (1)/5 * (4)/5
(3)/5 - (4)/25
(11)/25 = 0,44