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y- kasztany agnieszki
{3y=x
{x-15=y+15
{x=3y
{y=x-30
{x=3y
{y=3y-30
{x=3y {x=3y x=45, y= 15
{2y=30 {y=15
y-ilosc kasztanow Jacka
{y=3x
{15+x=3x-15
{y=3x
{x-3x=-15-15
{y=3x
{-2x=-30 II(-2)
{y=3x
{x=15
{y=3*15
{x=15
{y=45
{x=15
Odp. Agnieszka ma 15 kasztanów, a Jacek ma 45 kasztanów.