Răspuns :
m = mama
b = balaurul
m-6b
6b-b=25
5b=25
b=25:5
b=5 ani are balaurul
m=6b
m=5*6
m=30 ani are mama
b = balaurul
m-6b
6b-b=25
5b=25
b=25:5
b=5 ani are balaurul
m=6b
m=5*6
m=30 ani are mama