Ajutor am nevoie urgent!
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+Răspuns:
ms1=50g
c1=10%
c1=md1x100/ms1------> md1= 10x50/100g=5g
c2= 2c1=20%
m se adauga atat la md, cat si la ms
c2= (md1+md)x100/ (ms1+md)
20/100= (5+md)/(50+md)
20(50+md)=100(5+md)
md=6,25g
Explicație: