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k in (-oo:+oo)
k/25 = 5/12 // - 5/12
k/25-(5/12) = 0
k/25-5/12 = 0
1/25*k-5/12 = 0 // + 5/12
1/25*k = 5/12 // : 1/25
k = 5/12/1/25
k = 125/12
k = 125/12
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