Question 1144888
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You are given  {{{(K+12)/15}}} = {{{30/25}}}.


Hence,  {{{(K+12)/15}}} = {{{6/5}}},  which implies


    K + 12 = {{{(6*15)/5}}} = 6*3 = 18.


<U>ANSWER</U>.  K = 18 - 12 = 6.
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Check it on your own.