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k in (-oo:+oo)
(2*k-3)/5 = 7 // - 7
(2*k-3)/5-7 = 0
(2*k-3)/5+(-7*5)/5 = 0
2*k-7*5-3 = 0
2*k-38 = 0
(2*k-38)/5 = 0
(2*k-38)/5 = 0 // * 5
2*k-38 = 0
2*k-38 = 0 // + 38
2*k = 38 // : 2
k = 38/2
k = 19
k = 19
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