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The length is 12 more then the width the perimiter is 7 times the width?
Wiki User
∙ 15y ago
It's been a while, but I'll take a stab at this one. Assuming this is a rectangular shape:
width = w
length = w + 12
perimeter = length + length + width + width
As stated above, p = 7w, so:
7w (perimeter) = (w + 12) + (w + 12) + w + w
7w = 4w + 24 (simplifying the above)
-4w -4w (getting all the w's on one side)
------------------
3w = 24
w = 8
Checking our work. Substituting 8 for w:
p = 7(8)
p = 56
P = (8+12) + (8 + 12) + 8 + 8
p = 20 + 20 + 8 + 8
p = 56
Wiki User
∙ 15y ago
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