Răspunsuri

2014-02-27T20:28:07+02:00
287- 26= 261 copii ramasi
f +b=261

f= \frac{b}{2}

inlocuim in f+b=261

 \frac{b}{2} + b+ 261 (inmultim cu 2 tot)

b+2b= 522
3b=522
b=174
f=174 : 2= 87