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a fost răspuns

20 de gaini si 7 gaste consuma intr-un an 1878 kilograme de graunte
iar 30 gaini si 7 gaste consuma 2558 kg graunte.Cate kg de graunte consuma o gaina dar o gasca

Răspuns :

Anetud
20gaini+7 gaste=1878 kg
30gaini+7gaste=2558 kg
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10gaini=680kg
1gaina=680:10
1 gaina=68kg

20x68+7gaste=1878
1360+7gaste=1878
7 gaste=1878-1360
7 gaste=518
1 gasca=518:7
1 gasca=74kg

proba:
20x68+7x74=1360+518=1878


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