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k in (-oo:+oo)
3*k-(1/2) = 35/2 // - 35/2
3*k-(1/2)-(35/2) = 0
3*k-1/2-35/2 = 0
3*k-18 = 0 // + 18
3*k = 18 // : 3
k = 18/3
k = 6
k = 6
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