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p in (-oo:+oo)
(4/13)*(p+2)-((8/13)*(p-2)) = 0
(4/13)*(p+2)+(-8/13)*(p-2) = 0
4/13*(p+2)-8/13*(p-2) = 0
4/13*(p+2)-8/13*(p-2) = 0
24/13-4/13*p = 0
24/13-4/13*p = 0
24/13-4/13*p = 0 // - 24/13
-4/13*p = -24/13 // : -4/13
p = -24/13/(-4/13)
p = 6
p = 6
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