Răspunsuri

2014-10-11T14:35:19+03:00
Notam
Alexandra=a
Andreea=b
Adi=c
stim ca
a=c+200+c
b=c+200
atunci
a+b+c=1600
c+200+c+c+200+c=1600
4c=1600-400
4c=1200
c=1200:4
c=300
atunci
Alexandra=c+200+c=300+200+300=800
Andreea=c+200=300+200=500
Adi=300

800+500+300=1600