Răspuns :
/........../........../..........l este traseul
/........../ a parcurs prima zi
/........../+2 a parcurs a doua zi
/........../-2=10 a treia zi
/........../=10=+2=12 km a treia zi
12+2=14 km a doua zi
. 12 km prima zi
12+14+10=36 km traseul intreg
sau
12x3=36 km traseul inreg
R: a doua zi a parcurs 14 km
/........../ a parcurs prima zi
/........../+2 a parcurs a doua zi
/........../-2=10 a treia zi
/........../=10=+2=12 km a treia zi
12+2=14 km a doua zi
. 12 km prima zi
12+14+10=36 km traseul intreg
sau
12x3=36 km traseul inreg
R: a doua zi a parcurs 14 km
Fie x-distanta
x=x/3+(x-x/3):2+2+10
3x=x+2x:2+6+30
3x=x+x+36
x=36
A2a zi 36-12-10=14km
x=x/3+(x-x/3):2+2+10
3x=x+2x:2+6+30
3x=x+x+36
x=36
A2a zi 36-12-10=14km