Question 253768
P=2l+2w (perimeter formula)
P=86
l=2w+4 (length = 4 more than twice the width)
Substitute 2w+4 in for l in the perimeter formula.
Substitute 86 in for P in the perimeter formula.
solve for w.
Plug this quantity in for w in the formula l=2w+4 and find your length.
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Email me at justin.sheppard.tech@hotmail.com and I will send you the link to an online whiteboard.  I will show you how to do this in the online whiteboard (it has voice over IP (VOIP) also, so you can hear my explanations.
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Justin