Răspuns :
notam d-distanta totala
3/4·d+1/6·d+35=d |·12
9d+2d+420=12d
12d-9d-2d=420
d=420km
distanta totala este 420km
3/4·d+1/6·d+35=d |·12
9d+2d+420=12d
12d-9d-2d=420
d=420km
distanta totala este 420km