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k in (-oo:+oo)
(2/3)*k+1 = 25/3 // - 25/3
(2/3)*k-(25/3)+1 = 0
(2/3)*k-25/3+1 = 0
2/3*k-22/3 = 0 // + 22/3
2/3*k = 22/3 // : 2/3
k = 22/3/2/3
k = 11
k = 11
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