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k in (-oo:+oo)
2*(-3*k-2) = -58 // + 58
2*(-3*k-2)+58 = 0
2*(-3*k-2)+58 = 0
54-6*k = 0
54-6*k = 0
54-6*k = 0 // - 54
-6*k = -54 // : -6
k = -54/(-6)
k = 9
k = 9
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