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k in (-oo:+oo)
8-(4*k) = 52 // - 52
8-(4*k)-52 = 0
8-4*k-52 = 0
-4*k-44 = 0 // + 44
-4*k = 44 // : -4
k = 44/(-4)
k = -11
k = -11
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