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k in (-oo:+oo)
3*(-4*k-6) = -162 // + 162
3*(-4*k-6)+162 = 0
3*(-4*k-6)+162 = 0
144-12*k = 0
144-12*k = 0
144-12*k = 0 // - 144
-12*k = -144 // : -12
k = -144/(-12)
k = 12
k = 12
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