Răspuns :
30 elevi(F+B)
-8 F, +8 B =》2F= B
2F(B)+ F=30
F=30:3 =》10 F
2F= 10*2=》20 B
10F+8=18 Fete
20-8=12 Baieti
-8 F, +8 B =》2F= B
2F(B)+ F=30
F=30:3 =》10 F
2F= 10*2=》20 B
10F+8=18 Fete
20-8=12 Baieti