a × 8 = 56
a = 56 : 8
a = 7
Proba : 7 × 8 = 56
m × 6 = 9
m = 9 : 6
m = 1, 5
Proba : 1, 5 × 6 = 9
42 : b = 6
b = 42 : 6
b = 7
Proba : 42 : 7 = 6
36 : x = 9
x = 36 : 9
x = 4
Proba : 36 : 4 = 9
c × 7 = 3
c = 3 : 7
c = 0, 428571
Proba : 0, 428571 × 7 = 3
6 × a = 30
a = 30 : 6
a = 5
Proba : 6 × 5 = 30