Răspuns :
CALCULEZ md3 din solutia finala
c3= md3x100/ms3----> md3= 5x200/100g= 10g dare
dar
md3= md1+md2= c1xms1/100+ c2xms2/100
si ms1+ms2=200
10= (3ms1+7ms2)/100 unde ms1= 200-ms2
1000= 3(200-ms2)+7ms2
rezulta ms2=ms1= 100g
CALCULEZ md3 din solutia finala
c3= md3x100/ms3----> md3= 5x200/100g= 10g dare
dar
md3= md1+md2= c1xms1/100+ c2xms2/100
si ms1+ms2=200
10= (3ms1+7ms2)/100 unde ms1= 200-ms2
1000= 3(200-ms2)+7ms2
rezulta ms2=ms1= 100g