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k in (-oo:+oo)
3*k-(7/5) = 16 // - 16
3*k-(7/5)-16 = 0
3*k-7/5-16 = 0
3*k-87/5 = 0 // + 87/5
3*k = 87/5 // : 3
k = 87/5/3
k = 29/5
k = 29/5
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