1.
ms1= 800g, c1%= 20%
m.apa= 400g
stim ca c% = mdx100/ms
=> md = ms1xc1/100 = 800x20/100 = 160g
ms.final = ms1 + m.apa = 800+400 = 1200g
c%final = mdx100/ms.final
= 160x100/1200 = 13,33%
2.
md= 300g , m.apa= 1700g
ms = md+m.apa = 300+1700 = 2000g
c% = mdx100/ms = 300x100/2000 = 15%
3.
md= 250g , c% = 50%
c% = mdx100/ms
=> ms = mdx100/c% = 250x100/50 = 500g sol.
