Răspunsuri

2014-06-25T14:30:32+03:00
D=Drum
R=Rest

D-D*20/100=R sau D-D/5=R  sau 5D-D=5R => 4D=5R
R-R*30/100=560 sau R-R*3/10=560

10R-3R=560*10
7R=5600
R=800

4D=5R=4000
D=400:4=1000

Raspuns:
Drum=1000m