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the prerimeter of abcd is 92cm. ad is 7 more than twice ab. find the length of all four sides.

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P = 92cm.
ab = X cm.
ad = (2x+7)cm.

P = 2x + 2(2x+7) = 92cm,
2x + 4x + 14 = 92,
6x = 92 - 14 = 78,
X = 13cm = ab = cd.
2x + 7 = 2*13 + 7 = 33cm = ad = bc.

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