30/20=18/20k

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Solution for 30/20=18/20k equation: 


k in (-oo:+oo)

30/20 = (18/20)*k // - (18/20)*k

30/20-((18/20)*k) = 0

(-9/10)*k+30/20 = 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

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