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

Răspuns :

Răspuns:

20 gaini..... 7 gaste..... 1878

30gaini......7 gaste....... 2558

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10gaini.= 680

1 gaina=68

(68×20)+7 gaste=1878

1360+7gaste=1878

7gaste=1878-1360

7gaste=518

1gasca=518:7

1gasca=74