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Length of a rectangle is 13 cm less than 5 times it's width. Its area is 28 square cm. Find dimensions of rectangle

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L = 5W-13
LW = 28

(5W-13)W = 28
5W^2 - 13W - 28 = 0
(5W+7)(W-4) = 0

so, W=4
L = 5*4-13 = 7

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