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k in (-oo:+oo)
487/12 = 4*k-((1/3)*k)+1/4 // - 4*k-((1/3)*k)+1/4
(1/3)*k-(4*k)+487/12-(1/4) = 0
(1/3)*k-4*k+487/12-1/4 = 0
121/3-11/3*k = 0 // - 121/3
-11/3*k = -121/3 // : -11/3
k = -121/3/(-11/3)
k = 11
k = 11
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