Sc.primara
fi b , bursa elevului
atunci
o bursa +o jumatatede bursa=450 lei
2 jumatatide bursa + o jumatatede bursa=450
3 jumatatide bursa ...450 lei
o jumatatede bursa =450:3=150 lei
o bursa iontreaga =2 jumatai =o jumatate + ojumatate=150+150=300 lei
pt gimnaziu
Fie b=bursa
atunci
b=450=b/2
b+b/2=450
3b/2=450
(3/2) *b=450
b=450:(3/2)=450*(2/3)=150*2=300 lei
