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Hey! Dau funda.va rog raspundeti repede pls! Daca in 100l aer sunt 21 l de oxigen,află cati litri de oxigen sunt in 550 l aer.

Răspuns :

100 l aer.........21 l oxigen
550 l aer.......x l oxigen

x= (550•21)/100= 11550/100= 115,5 l oxigen
100 l aer ...... 21 l oxigen
550l aer ...........a l oxigen
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100/550=21/a
a=550×21/100
a=115.5