Răspuns:
x=distanta drumului
x/6 - parcurge in prima zi
x-x/6=5x/6 rest
5x/6·1/4+50=5x/24+50 - parcurge adoua zi
85 km parcurge atreia zi
x/6+5x/24+50+85=x amplificam
4x+5x+1200+2040=24x
3240=24x-9x
x=3240:15
x=216 km lungimea drumului
5·216:24+50=95 km parcurge adoua zi