a= primul numar
b= al doilea numar
c= al treilea numar
aI--------I b I---------------------I
a aI--------II--------I b-5I------------------I 5 I
380-5=375
375:3=125
b=2*125+5=225
Ecutatiile
a+b=380
2a=b-5
b=2a+5
a+2a+5=380
3a=380-5
3a=375
a=375/3
a=125
b=2*125+5=255
Sper ca te am putut fii de ajutor!!!