notam :.... drumul=x km
pima zi=1/4(x)
a 2-a zi=2/3(r)+5km
a 3-ia zi=30 km
x) |____|____|____|____|
\------/=>1/4(x)
rest |____|____|____|
\----------------/=> 2/3(r)+5km
rest |___|=> 30km
30+5=35 km=> 1/3(r)
35*3=105 km restul din prima zi
105:3*2+5=
=35*2+5
=70+5
=75 km a parcurs a 2-a zi
105:3*4=
=35*4
=140km totalul de drum
140:4=35 km a parcurs in prima zi
verificare
35+75+30=
=110+30
=140 km in total