Question

Proboema 10.Vă roggggg!

Answer 1

f+b+c=5300
b=c-1970             c=b+1970
b=f-205-1970       f=b+205+1970

inlocuim necunoscutele:

b+205+1970+b+b+1970=5300
3b+205+1970+1970=5300
3b+4145=5300
3b=5300-4145
3b=1155
b=1155:3
b=385 barbati

c=385+1970
c=2355 copii

f+385+2355=5300
f+2740=5300
f=5300-2740
f=2560 femei

proba: 2560+2355+385=5300

Answer 2

[---] copii 
[---]--]1970 surplus barbati
[---]--]--]1970 al doilea secment, al treilea secment 205(femei)
1970+1970+205=4145(barbati si femei)
5300-4145=1155(copii, femei si barbati in nr. egal)
1155:3=185(copii)
1970+385=2355(barbati)
2355+205=2560(femei)
Sper ca te-am ajutat !