Question 940723
If it's a right triangle, it follows the Pythagorean theorem,
{{{x^2+(x+5)^2=25^2}}}
{{{x^2+x^2+10x+25=625}}}
{{{2x^2+10x-600=0}}}
{{{x^2+5x-300=0}}}
{{{(x+20)(x-15)=0}}}
Only the positive value makes sense here,
{{{x-15=0}}}
{{{x=15}}}