va rog ajutati ma!Intrebarea are 50puncte....Ajutorr
doar soluția S4 si S5

S4
md = 90g, c% = 30%
=> ms = mdx100/c% = 90x100/30 = 300 g
=> m.apa = ms-md = 300 - 90 = 210 g
S5
md = 30g, m.apa = 270g
=> ms = md+m.apa = 30+270 = 300g
=> c% = mdx100/ms = 30x100/300 = 10%