Explicație:
md=30g
c=15%
[tex]c = \frac{md}{ms} \times 100[/tex]
[tex]15 = \frac{30}{ms} \times 100[/tex]
[tex] \frac{15}{100} = \frac{30}{ms} [/tex]
[tex]15 \times ms = 100 \times 30[/tex]
[tex]ms = \frac{100 \times 30}{15} = \frac{3000}{15} = 200[/tex]
