algebra
posted by jojo .
a building in a city has a rectangular base. the lenght of the base measures 70 ft less than twice the width. the perimeter of this base is 820 ft.

P = 2L + 2W
820 = 2(W  70) + 2W
820 = 4W  140
820  140 = 4W
680/4 = W
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