Question

va rog mult !! dau Coroana

Answer 1

a=lungime traseu
/=fractie,impartire

prima zi: a/3
a doua zi:1/4(a-a/3)=1/4(3a-a)/3=1/4x2a/3=2a/12=a/6
a treia zi: 2/5(a-a/3-a/6)=2/5(6a-2a-a)/6=2/5x3a/6=6a/30=a/5
a patra zi: 9 km

a=a/3+a/6+a/5+9
30a=10a+5a+6a+270
30a=21a+270
30a-21a=270
9a=270
a=270:9
a=30 kg este lungimea traseului

prima zi :30:3=10 km
a doua zi:30:6=5 km
a treia zi:30:5=6 km
a patra zi: 9 km

Verificare:
10+5+6+9=15+15=30 km