Răspuns :
1 zi 30/100din a=3a/10
2zi 350km
3a/10+350=a 3a-3500=10a 7a=3500 a=500 sau
350=70/100dina 350=7a/10 7a=3500 a=500
2zi 350km
3a/10+350=a 3a-3500=10a 7a=3500 a=500 sau
350=70/100dina 350=7a/10 7a=3500 a=500