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k in (-oo:+oo)
(k+2)/3 = (k-4)/5 // - (k-4)/5
(k+2)/3-((k-4)/5) = 0
(k+2)/3+(-1*(k-4))/5 = 0
(5*(k+2))/(3*5)+(-1*3*(k-4))/(3*5) = 0
5*(k+2)-1*3*(k-4) = 0
2*k+22 = 0
(2*k+22)/(3*5) = 0
(2*k+22)/(3*5) = 0 // * 3*5
2*k+22 = 0
2*k+22 = 0 // - 22
2*k = -22 // : 2
k = -22/2
k = -11
k = -11
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