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k in (-oo:+oo)
(3/4)*k-5 = 1/4-2 // - 1/4-2
(3/4)*k-(1/4)-5+2 = 0
(3/4)*k-1/4-5+2 = 0
3/4*k-13/4 = 0 // + 13/4
3/4*k = 13/4 // : 3/4
k = 13/4/3/4
k = 13/3
k = 13/3
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