Question 991778
{{{L=5+3W}}}
,
,
{{{2L+2W=58}}}
{{{2(5+3W)+2W=58}}}
{{{10+6W+2W=58}}}
{{{8W=48}}}
{{{W=6}}}
Then,
{{{L=5+3(6)=5+18=23}}}