1. c= mdx100/ms
57,45= 154x100/ms-----------------> ms=268g
2.c1=20%......ms1?
c2=40%.....ms2?
c3= 25%
ms3=200g
c3= (md1+md2)x100/(ms1+ms2)
unde md1= c1xms1/100 si md2=c2xms2/100
rezulta un sistem de doua ecuatii:
25= (0,2ms1+0,4ms2)/200
ms1+ms2=200
din acest sistem de doua ecuatii, calculezi ms1 si ms2!