document.write( "Question 478222: A rectangular swimming pool measures 20 feet by 40 feet. A walk of uniform width surrounds it. The total area of the pool and the walk is 1500 ft^2. Find the width of the walk. \n" ); document.write( "
Algebra.Com's Answer #327659 by Alan3354(69443)\"\" \"About 
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x = width of walk
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\n" ); document.write( "(x+20)*(x+40) = 1500
\n" ); document.write( "\"x%5E2+%2B+60x+-+700+=+0\"
\n" ); document.write( "(x-10)*(x+70) = 0
\n" ); document.write( "x = -70 (makes no sense)
\n" ); document.write( "x = 10 feet works
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