Answer :

snowninja
k in (-oo:+oo)

3/2 = (9/10)*k // - (9/10)*k

3/2-((9/10)*k) = 0

(-9/10)*k+3/2 = 0

3/2-9/10*k = 0 // - 3/2

-9/10*k = -3/2 // : -9/10

k = -3/2/(-9/10)

k = 5/3

k = 5/3
this is the answer

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