Răspuns :
f+b=34 elevi
f-4....=>....f:2 >b:4 cu 3......=>f:2=b:4+3
---------------------------------
f=?,b=?
daca ...f:2=b:4+3...=>...b:4+3=2f...=> f-4=2f...=>...f=(2*(3+4))+4...=>..f=(2*7)+4
=>f=14+4....=>...f=18
18+b=34
b=34-18
b=16
verificare
(18-4):2=16:4+3
14:2=4+3
7=7
sfertul baietilor= jumatatea fetelor-3...=>16:4=14:2-3....=>...4=7-3..=>4=4
R=> fete=18
baieti=16
..................
= 34 copii
f-4....=>....f:2 >b:4 cu 3......=>f:2=b:4+3
---------------------------------
f=?,b=?
daca ...f:2=b:4+3...=>...b:4+3=2f...=> f-4=2f...=>...f=(2*(3+4))+4...=>..f=(2*7)+4
=>f=14+4....=>...f=18
18+b=34
b=34-18
b=16
verificare
(18-4):2=16:4+3
14:2=4+3
7=7
sfertul baietilor= jumatatea fetelor-3...=>16:4=14:2-3....=>...4=7-3..=>4=4
R=> fete=18
baieti=16
..................
= 34 copii
f+b=34
(f-4):2=b:4+3
2f-8=b+12
2f=b+20
f=(b+20):2
(b+20):2+b=34
b+20+2b=68
3b=48
b=16
f=36:2=18
(f-4):2=b:4+3
2f-8=b+12
2f=b+20
f=(b+20):2
(b+20):2+b=34
b+20+2b=68
3b=48
b=16
f=36:2=18