Un calator parcurge un drum in 3 zile. In prima zi parcurge 4 cincisprezecimi din drum, a doua zi parcurge jumatate din distanta ramasa si inca 5km, iar in a treia zi restul de 17km.
a) Lungimea drumului
b) Parcurs prima zi
c) Parcurs a doua zi
a)x=drumul 4/15*x+1/2(x-4x/15)+5+17=x 4x/15+1/2*11x/15+22=x 4x/15+11x/30+22=x 8x+11x+660=30x 19x+660=30x 660=11x⇒x=60 km b)4/15*60=16 km c)1/2*(60-16)+5 1/2*44+5=27 km
