Question 885375
L length
w width
{{{L=5w}}} and {{{2w+2L<=104}}}.
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{{{2w+2(5w)<=104}}}
{{{w+5w<=52}}}
{{{6w<=52}}}
{{{3w<=26}}}
{{{w<=26/3}}}, {{{w<=8&2/3}}}----width
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Finding for dimension L, 
Solve the other equation for w:
{{{w=L/5}}}
Substitute into the solution for w:
{{{L/5<=26/3}}}
{{{L<=5*26/3}}}
{{{L<=130/3}}} or {{{L<=43&1/3}}}-----Length