Răspuns :
f+s=x
f=fag
s=stejar
x=total de puieti
f=3s
f-s=14 =>3s-s=14 2s=14 s=7
f=7*3=21
x=21+7=28
f=fag
s=stejar
x=total de puieti
f=3s
f-s=14 =>3s-s=14 2s=14 s=7
f=7*3=21
x=21+7=28