Question 933336
{{{L=W+5}}}
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For a rectangle,
{{{P=2*(L+W)}}}
Substituting from above,
{{{P=2*(W+5+W)=42}}}
{{{2W+5=21}}}
{{{2W=16}}}
{{{W=8}}}
THen,
{{{L=8+5}}}
{{{L=13}}}