Odpowiedzi

2009-05-04T21:30:21+02:00
Y-wiek Kasi
x- wiek Ani

{ y=x+4
{y+x=30

{y=x+4
{x+4+x=30

{y+x+4
{2x=26/:2

{y=x+4
{x=13

{y=17
{x=13
2009-05-04T21:30:38+02:00
X-wiek Kasi
y-wiek Ani


y=x-4
x+y=30

x+x-4=30
2x=34
x=17
y=x-4
y=17-4
y=13
Odp Kasia ma 17 a Ania ma 13 lat