Răspuns :
1. a=17 si b=21
M_a=(17+21):2=>M_a=38:2=>M_a=19
2.M_a=(a+b):2=>17=(a+b):2=>a+b=17*2=>a+b=34
M_a=(17+21):2=>M_a=38:2=>M_a=19
2.M_a=(a+b):2=>17=(a+b):2=>a+b=17*2=>a+b=34