Question 47366
{{{12/(x + 5) + 5/x = 20/x}}}
{{{12x(x+5)/(x+5) + 5x(x+5)/x = 20x(x+5)/x}}}
{{{12x + 5x + 25 = 20x + 100}}}
{{{-75 = 3x}}}
{{{-25 = x}}}
Check:
{{{12/(-25 + 5) + 5/(-25) = 20/(-25)}}}
{{{-3/5 + -1/5 = -4/5}}}
{{{-4/5 = -4/5}}} Correct