Question

calculează te rog aceasta problema.Dau coroana

Answer 1

sol.1

c1=md1x100/ms1----> md1= 5x200/100g= 10g

sol.2

md2= md1+md= 10+md

ms2=ms1+md= 200+md

20/100= (10+md)/(200+md)

100(10+md)-=20(200+md)------->   calculeaza md !!