Afla a,b
A+b=13
4•a+3•b=46
Va dog repede acord coroana


Răspuns :

3a+3b=13x3=39
46-39=7
b=7
13-7=6
a=6
3a+3d=13+3=39 46-39=7 13-7=6 Deci a=6;si b=7