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2Karina = basia - 5
karina x
basia y
{x+y=35
{2x=y-5
{x+y=35
{2x+5=y
{x+2x+5=35
{2x+5=y
{3x=10
{2x+5=y
{x=10
{20+5=y
{x=10 - karina
{y=25 - basia
Proszę ;) Liczę na Naj ;))
y-wiek Basi
x+y=35
2x+5=y
x+(2x+5)=35
2x+5=y
x+2x+5=35
2x+5=y
3x=30
2x+5=y
x=10
20+5=y
x=10
y=25
Odp.Karina ma 10lat, a Basia 25