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k in (-oo:+oo)
(3*k)/287 = 2/3 // - 2/3
(3*k)/287-(2/3) = 0
(3*k)/287-2/3 = 0
3/287*k-2/3 = 0 // + 2/3
3/287*k = 2/3 // : 3/287
k = 2/3/3/287
k = 574/9
k = 574/9
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