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k in (-oo:+oo)
3*k-(7/2) = 2 // - 2
3*k-(7/2)-2 = 0
3*k-7/2-2 = 0
3*k-11/2 = 0 // + 11/2
3*k = 11/2 // : 3
k = 11/2/3
k = 11/6
k = 11/6
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