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x-wiek Basi
y-wiek Agnieszki
x-5=+y
x-1=2(y+1)
x-y=5
x-1=2y-2
x-y=5 / *(-2)
x-2y=-1
-2x+2y=-10
x-2y=-1
-x=-11 /*(-1)
x=11
11-5=y
6=y
y=6
Pozdrawiam:)