Question

O gaina o rata si o gasc cantaresc 9 kg impreu
na .gaina si rata in total 5 kg rata si gasca 7 kg impreuna .care este greutatea fiecarei pasari

Answer 1

gai+r+gas=9kg;
gai+r=5kg;
r+gas=7kg;
⇒gas=9kg-5kg=4kg[gasca];
⇒r=7kg-4kg=3kg[rata];
⇒gai=5kg-3kg=2kg[gaina];