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y- ptaszki Oli
x=3y
x-5= 2y
x-3y= 0 /* (-1)
x- 2y= 5
-x +3y = 0
x-2y= 5
y=5
x= 3*5
x=15
Odp. Ania ma 15 drewnianych ptaszków, a Ola 5.