Question 48560
{{{(k)/(7-k)-(2)/(k)=3}}}
{{{k^2-2(7-k)=3(7-k)(k)}}}
{{{k^2-14+2k =21k-3k^2}}}
{{{4k^2-10k-14=0}}}
{{{2(2k^2-5k-7)=0}}}
{{{2(2k^2-2k-7k-7)=0}}}
{{{2(2k(k+1)-7(k+1))=0}}}
{{{2(2k-7)(k+1)=0}}}
2k-7=0 or k+1=0
2k=7 or k=-1
k=7/2 or k=-1