Răspuns :
a + b+ c = 72
a = 3 x 8 = 24
b = 12 + a = 12 + 24 = 36
24 + 36 + c = 72
60 + c = 72
c= 72 - 60
c= 12
proba 24 + 36 + 12 = 72
a = 3 x 8 = 24
b = 12 + a = 12 + 24 = 36
24 + 36 + c = 72
60 + c = 72
c= 72 - 60
c= 12
proba 24 + 36 + 12 = 72