Răspuns:
C=mdx100/ms
SOLUTIA 1
c1= 45%
ms1=400g
md1= 45x400/100g= 180g zahar
SOLUTIA 2
masa de zahar se adauga atat la md cat si la ms !
md2= md1+ m,adaugat= 180+ m,adaugat
ms= ms1+m,adaugat= 400+m,adaugat
65= (180+m,adaugat)100/(400+m,adaugat)
18000+100m,adaugat=26000+ 65m,adaugat
m,adaugat= 228,6 g zahar
Explicație: