Question

Trei copii au impreuna 1030 lei.Al doilea are de 3 ori cat primul si inca 6 lei,iar al treilea de 4 ori cat primii doi la un loc.Cati lei are fiecare copil?

Answer 1

a+b+c=1030
b=3a+6
c=4ab
a+3a+6+4(a+3a+6)=4a+6+4(4a+6)
4a+6+16a+24=20a+30
20a+30=1030
20a=1030-30
20a=1000
a=1000/20=50
b=3a+6=3*50+6=150+6=156
c=4ab=4(50+156)=4*206=824
verificare: a+b+c=50+156+824=1030