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k in (-oo:+oo)
2*k-8 = 27-3*k // - 27-3*k
2*k-(-3*k)-27-8 = 0
2*k+3*k-27-8 = 0
5*k-35 = 0 // + 35
5*k = 35 // : 5
k = 35/5
k = 7
k = 7
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