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OpenStudy (anonymous):
The length of a rectangle is 2 feet more than twice its width. It's area is 84 square inches. Find the length and width of the rectangle
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OpenStudy (confluxepic):
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OpenStudy (confluxepic):
A=lw
OpenStudy (confluxepic):
84=(2w+2)(w)
OpenStudy (confluxepic):
84=2w^2+2w
OpenStudy (confluxepic):
42=w^2+w
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OpenStudy (confluxepic):
42-w=w^2
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