Răspuns:
ms1=? ms2=?
ms1+ms2= 2kg
c1= 70%
c2=30%
c3=40%
c=mdx100/ms
c3=md3x100/ms3. unde md3=md1+md2
ms3= 2kg=ms1+ms2
md1= c1xms1/100= 0,7ms1
md2= c2xms2/100=0,3ms2
40= (0,7ms1+0,3ms2)x100/2 unde ms1= 2-ms2
80/100=0,7(2-ms2)+0,3ms2---> ms2= 1,5kg si ms1= 2-1,5=> 0,5kg
Explicație: