Question 945295
"2 times the length of the legs"
Is that one leg each, or the sum of both "legs"?


To assume one leg at a time, then
{{{b=3+2x}}}
and so perimeter is {{{23=(3+2x)+x+x}}}
{{{23=4x+3}}}
{{{4x=20}}}
{{{x=5}}}----each leg
and
{{{2*5+3}}}
{{{13}}}----the base


A check:
{{{5+5<13}}}

According to the assumption, the triangle does not work.


You can try the other assumption and check if that works or not.