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k in (-oo:+oo)
(2/5)*k+1/2 = -((3/4)*k)-32/5 // + -((3/4)*k)-32/5
(2/5)*k+(3/4)*k+1/2-(-32/5) = 0
(2/5)*k+(3/4)*k+1/2+32/5 = 0
23/20*k+69/10 = 0 // - 69/10
23/20*k = -69/10 // : 23/20
k = -69/10/23/20
k = -6
k = -6
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