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OpenStudy (anonymous):
The length of a rectangle is 35ft, more than 4 times its width. the perimeter is 770. find its dimensions.
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OpenStudy (hoblos):
l = 4w+35 2l+2w = 770 replace the first equation in the second 2(2w+35)+2w=770 8w+70 +2w = 770 10w = 700 w=70 l=4w+35 = 315
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