Question

Cum se rezolva acest ex?

Answer 1

Răspuns:

c%=ms/md

1) c%=20/400=2/40=0,05=5%

2)md=(ms/c%)=500/20=25g

msolent=500-25=475g

3)ms=240+60=300g

c%=60/300=6/30=0,2=20%

4)ms=40×80=3200g

msol=3200-80=3120g

5)md=ms-msol=800-600=200g

c%=200/800=2/8=0,25=25%

6)