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k in (-oo:+oo)
3*k-1/3 = 25/33 // - 25/33
3*k-1/3-(25/33) = 0
3*k-1/3-25/33 = 0
3*k-12/11 = 0 // + 12/11
3*k = 12/11 // : 3
k = 12/11/3
k = 4/11
k = 4/11
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