ms1 = 400 g
c1= 30%
c.f.= c1/3 = 30/3 = 10%
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m.apa.adugata = ? g
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stim ca c% = mdx100/ms
=> md = ms1xc1/100 = 400x30/100 = 120 g
ms.f. = ms1 + m.apa.aduagata (am notat-o cu a)
= ms1 + a = 400 + a
=> c.f. = mdx100/ms.f
=> 10 = 120x100/(400+a)
=> 4000 + 10a = 12000
=> a = 8000/10 = 800 g apa adugata
facem proba...
ms.f = 400+800 = 1200 g
md= 120 g
=> c.f. = 120x100/1200 = 10% , deci verifica calculele de mai sus
