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o gaina o rata si o gisca ou in total 45 pui rata are cu 5 pui mai mult decit gisca iar gaina are dev 2 ori mai multi pui decit gisca .Citi pui are gisca?

Răspuns :

2×gasca + 5 + gasca + gasca = 45 pui
5+ 2× gasca + gasca + gasca = 45 pui
5+ 4 × gasca = 45 pui
4 × gasca = 45 - 5
4 × gasca = 40
gasca = 40 : 4
gasca = 10
rata = 10 + 5
rata = 15
gaina = 10 × 2
gaina = 20