Question 1018471
If what you really have is  3/(x+2)-1/(5x)=1/x, then multiply the two members by {{{5x(x+2)}}}.


If what you really have is  3/(x+2)-(1/5)x=1/x, then multiply the members by {{{5x(x+2)}}}, which is again the same as the other identified simplest denominator,... and solve accordingly.