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p in (-oo:+oo)
(3*p)/2-(4*(p-2)) = 23 // - 23
(3*p)/2-(4*(p-2))-23 = 0
(3*p)/2-4*(p-2)-23 = 0
(-4*2*(p-2))/2+(3*p)/2+(-23*2)/2 = 0
3*p-4*2*(p-2)-23*2 = 0
16-5*p-46 = 0
-5*p-30 = 0
(-5*p-30)/2 = 0
(-5*p-30)/2 = 0 // * 2
-5*p-30 = 0
-5*p-30 = 0 // + 30
-5*p = 30 // : -5
p = 30/(-5)
p = -6
p = -6
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