Question 982108
Make your characters readable for a human!  If you do not mean the ONE-digit, then use your variables chosen to show  {{{system(L+b=24,L*b=135)}}}.


{{{b=24-L;}}}
.
{{{L(24-L)=135}}}
{{{24L-L^2=135}}}
{{{L^2-24L=-135}}}
{{{L^2-24L+135=0}}}----------Solve this quadratic equation for L, first.