Question

Andrei,Alin si Mihai ai 3000 RON.Andrei are cu 450 mai mult decat Mihai iar tot Andrei are cu 1050 mai mult decat Alin.Cati bani au fiecare???

Answer 1

a=Andrei
b=Alin
c=Mihai

a+b+c=3000
a=c+450
a=b+1050

c=a-450
b=a-1050

a+a-1050+a-450=3000
3a=3000+1050+450
3a=4500
a=4500:3
a=1500 lei are Andrei

b=1500-1050=450 lei are Alin
c=1500-450=1050 lei are Mihai

V: 1500+450+1050=3000

Answer 2

a+b+c =3000 lei
a=b(M)+450 lei
a=c+1050
a=1050+450
a=o bucata +1500
b=1050-450
b=o bucata +600
3000-1500-600=900
900:3=300
a=300+1500
a=1800
b=300+600
b=900
c=300