Question 1186924
{{{d(2d+4)=16}}}

{{{d=2}}}

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8 feet, length
2 feet, width








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{{{2d(d+2)=16}}}
{{{d(d+2)=8}}}
You can try using simple basic multiplication facts.
2 maybe?
{{{2(2+2)}}}
{{{2*4=8}}}
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Back to the original equation, 
{{{2(2*2+4)=16}}}
{{{2*8=16}}}
{{{(width)(length)=16}}}
width is 2, length is 8.