Răspuns:
Explicație pas cu pas:
deci fluturi+albine=34
albine+buburuze=26
buburuze+fluturi=30
adunam tot
2( fluturi+albine+buburuze)=34=26+30=90
fluturi+albine+buburuze=45
fluturi+albine=34 deci bubu=45-34=11
albine+buburuze=26 deci fluturi=45-26=19
buburuze+fluturi=30 deci albinme=45-30=15
poti verifica acum cele 3 date