72 : x = 8
x = 72 :8
х=9
9x = 81
x = 81/9
12x = 24 + 24
12x = 48
x = 48/12
х=4
8x = 72 - 16
8x = 56
x = 56/8
х=7
24 : x = 12 - 8
24 : x = 4
x =24 : 4
х=6
66 =66:x
х=1
72 : x = 8
x = 72 :8
х=9
9x = 81
x = 81/9
х=9
12x = 24 + 24
12x = 48
x = 48/12
х=4
8x = 72 - 16
8x = 56
x = 56/8
х=7
24 : x = 12 - 8
24 : x = 4
x =24 : 4
х=6
66 =66:x
х=1