Частина 2. Номер 329

72 : x = 9
x = 72 : 9
x = 8
72 : 8 = 9
9 = 9

68 : x = 4
x = 68 : 4
x = 17
68 : 17 = 4
4 = 4

50 : x = 25
x = 50 : 25
x = 2
50 : 2 = 25
25 = 25