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y-druga liczba
x+y=22
3x=y-2
x=22-y
3(22-y)=y-2
x=22-y
66-3y=y-2
x=22-y
-4y= -68
x=22-y
y=17
x=22-17
y=17
x=5
y=17
Są to liczby 5 i 17.