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2014-11-10T18:18:34+02:00
C=13%
ms=100g
cf=?%
md=c·ms supra 100=13·100 supra100=13g
100g -13g=87g solutie
cf=md·100supra ms=13·10 supra 87=130 supra 87= 130 impartit la 87 =1,43%
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