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2-p-5=p+5-5p+4
3p=12
p=4
:)
a, b, c
b-a=c-b
(p+5)-(5p-4)=2-(p+5)
p+5-5p+4=2-p-5
-4p+9=-3-p
-4p+p=-3-9
-3p=-12
p=4
sa liczbami ciągu dla p=4