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Răspuns :

6sticle.3litri=18litri
9sticle.2litri=18litri
4sticle.3litri+3sticle.2litri=12litri+6litri=18litri
2sticle.3litri+6sticle.2litri=6litri+12litri=18litri
B)
18litri:1,5litri=12sticle de 1.5 litri foloseste