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k in (-oo:+oo)
(3/5)*k-k-(1/3) = 115*(k+5) // - 115*(k+5)
(3/5)*k-(115*(k+5))-k-(1/3) = 0
(3/5)*k-115*(k+5)-k-1/3 = 0
(3*k)/5-115*(k+5)-k-1/3 = 0
(-115*3*5*(k+5))/(3*5)+(3*3*k)/(3*5)+(3*5*(-k))/(3*5)+(-1*5)/(3*5) = 0
3*3*k-115*3*5*(k+5)+3*5*(-k)-1*5 = 0
-1716*k-15*k-8625-5 = 0
-1731*k-8625-5 = 0
-1731*k-8630 = 0
(-1731*k-8630)/(3*5) = 0
(-1731*k-8630)/(3*5) = 0 // * 3*5
-1731*k-8630 = 0
-1731*k-8630 = 0 // + 8630
-1731*k = 8630 // : -1731
k = 8630/(-1731)
k = -8630/1731
k = -8630/1731
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