va rog am nevoie urgent dau coroana pls

Răspuns:
ms1=400g
c1=10%
ms2=100g
c2=20%
ms f=?
c f=?
c1/100=md1/ms1
10/100=md1/400
md1=400•10/100
md1=40g
c2/100=md2/ms2
20/100=md2/100
md2=100•20/100
md2=20g
ms f=ms1+ms2
ms f=400+100
ms f=500g
md f=md1+md2
md f=40+20
md f=60g
c f/100=md f/ms f
c f/100=60/500
c f=100•60/500
c f=12%