Question

VA rog!dau corona so cine raspunde îi boi da si Eu raspunsul la 2 î trebari
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Answer 1

 

$\displaystyle\bf\\\frac{2,\!4n}{5}=3,\!6\\\\2,\!4n=3,\!6\times5\\\\2,\!4n=18\\\\n=\frac{18}{2,\!4}=\frac{180}{24}=\frac{60}{8}=\frac{15}{2}=7,\!5\notin N$