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y - karty Ewelinki
{y - 0,1y = x + 0,1y
{x + y = 360
{x = 360 - y
{y - 0,1y = 360 - y + 0,1y
{x = 360 - y
{1,8y = 360
{y = 200
{x = 160
Odp. Basia ma 160 kart, a Ewelinka 200
x - karty Basi
y - karty Ewelinki
Rozwiązanie;
y - 0,1y = x + 0,1y
x + y = 360
x = 360 - y
y - 0,1y = 360 - y + 0,1y
x = 360 - y
1,8y = 360/1,8
y = 200
x = 160
Odp. Basia ma 160 kart, a Ewelinka 200 kart.