Răspuns:
c,f= (md1+md2)x100/(ms1+ms2)
ms1+ms2=220g
c,final= 20%
c1= 15%===> md1= c1xms1/100= 0,15ms1
c2= 35%====> md2= c2xms2/100= 0,35ms2
20=(0,15ms1+0,35ms2)X100/220
44= 0,15ms1+0,35ms2
dar ms1= 220-ms2
deci 44= 0,15(220-ms2)+ 0,35ms2
ms2=55g
ms1= 165g
m
Explicație: