Răspuns :
fluturi+albine=34 albine+buburuze=26 buburuze+fluturi=30 2fluturi+2albine+2buburuze=34+26+30 2x(fluturi+albine+buburuze)=90 fluturi+albine+buburuze=90:2 fluturi+albine+buburuze=45 fluturi+26=45 fluturi=45-26 fluturi=19 albine+30=45 albine=45-30 albine=15 buburuze+34=45 buburuze=45-34 buburuze=11 19+15+11=45(total)