Question 129949
Let {{{p}}}=perimeter
Let {{{w}}}= width
Let {{{l}}}= length
{{{p = w + w + l + l}}} 
{{{p = 16}}} 
{{{l = 2w + 2}}} 
{{{2w = l - 2}}} 
{{{16 = 2w + 2l}}} 
{{{16 = (l - 2) + 2l}}} 
{{{16 = 3l - 2}}}
{{{3l = 18}}}
{{{l = 6}}} 
The length is 6 meters
check answer:
{{{l = 2w + 2}}} 
{{{6 = 2w + 2}}}
{{{2w = 4}}}
{{{w = 2}}}
{{{p = w + w + l + l}}}
{{{16 = 2 + 2 + 6 + 6}}}
{{{16 = 16}}}
OK
{{{l = 2w + 2}}}
{{{6 = 2*2 + 2}}}
{{{6 = 6}}}
OK