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p in (-oo:+oo)
7.5 = p/10.2 // - p/10.2
7.5-(p/10.2) = 0
7.5-0.09803922*p = 0
7.5-0.09803922*p = 0 // - 7.5
-0.09803922*p = -7.5 // : -0.09803922
p = -7.5/(-0.09803922)
p = 76.49999663
p = 76.49999663
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