ms= 500 kg solutie
md= 75kg soda de rufe
c%=?
m apa=?
[tex]c = \frac{md}{ms} \times 100[/tex]
[tex]c = \frac{75}{500} \times 100[/tex]
Simplificam zerourile
[tex]c = \frac{75}{5} [/tex]
[tex]c = 15[/tex]
ms=md+m apa
75=500+m apa
m apa= 500-75
m apa=425