Question

Dau coroana!!! Macar 1 din ele, repede va rog​

Answer 1

1.

ms = 800g, c% = 15%

c% = mdx100/ms

=> md = msxc%/100

= 800x15/100 = 120g

m.apa = ms-md = 800-120 = 680 g

2.

m.apa= ms-md = 100-40 = 60g

c% = 40x100/100 = 40%

3.

ms = md+m.apa = 25+225 = 250 g

c% = 25x100/250 = 10%

4.

idem 1.

5.

ms = md+m.apa = md+320

20 = 100md/(md+320)

=> md = 6400/80 = 80g

=> ms = md+m.apa = 80+320 = 400g