Răspuns :
Notam albumele cu a ;b;c . B=3a ,c=(a+b):2 => c=2a . Rezulta b=852 ; c=568 . In total 1704marci
1)cate marci postale are colectionarul in al 2-lea album?
284 x 3=852
2)cate marci postale are colectionarul in primele doua albume?
284+852=1136
3)cate marci postale are colectionarul in al 3-lea album?
1136 :2=568
4)cate marci postale are colectionarul in cele 3 albume?
1136 + 568=1704
R:1704 marci postale
284 x 3=852
2)cate marci postale are colectionarul in primele doua albume?
284+852=1136
3)cate marci postale are colectionarul in al 3-lea album?
1136 :2=568
4)cate marci postale are colectionarul in cele 3 albume?
1136 + 568=1704
R:1704 marci postale