How Much Gold

How Much Gold

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Notre trio préféré a découvert une barre de métal mystérieuse, d'un alliage composé des métaux suivants : or (gold), fer (iron), cuivre (copper) et étain (tin). On ne connaît pas la quantité de chaque métal dans la barre, mais nous connaissons la proportion de différents alliages. Par exemple : en proportion, l'alliage or et étain représente 1/2 le la masse de la barre, l'alliage or et fer représente 1/3, l'alliage or et cuivre 1/4. "La proportion de l'alliage or et étain est 1/2" signifie que l'or et étain ensemble (leur...

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