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k in (-oo:+oo)
3*k+1/2 = 2-(4*k) // - 2-(4*k)
3*k+4*k+1/2-2 = 0
7*k-3/2 = 0 // + 3/2
7*k = 3/2 // : 7
k = 3/2/7
k = 3/14
k = 3/14
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