Question

ma puteti ajuta cu ex 9 va rog?

Answer 1

Notam distanta cu x. Avem:

$\dfrac{20x}{100} + 4,8= \dfrac{60x}{100}$
$0,2x+4,8=0,6x$
$2x+48=6x$
$6x-2x=48$
$4x=48$
$x= \dfrac{48}{4}=12 \ km$

Deci distanta dintre centrul orasului si poiana este de 12 km.

Answer 2

x=100%
20%(x)<60% cu 4,8km
60%(x)-20%(x)=4,8km....=> 40%(x)=4,8km
20%(x)=4,8:2
20%(x)=2,4km
60%(x)=2,4+4,8
60%(x)=7,2km

x=4,8km+7,2km
x=12km

20%(x)+60%(x)+20%(x)=12km
2,4km+7,2km+2,4km=12km