document.write( "Question 721968: A concrete walk of uniform width surrounds a rectangular swimming pool. Let x represent this width. If the pool is 6 ft. by 10 ft. and the total area of the pool and walk is 96 ft². Find the width of the walk. \n" ); document.write( "
Algebra.Com's Answer #442575 by mananth(16946)\"\" \"About 
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Let the width of sidewalk be x
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\n" ); document.write( "Length of pool = 10 ft
\n" ); document.write( "Width = 6 ft
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\n" ); document.write( "Area = 60 m^2
\n" ); document.write( "Area of sidewalk = 36 m^2
\n" ); document.write( "Length of pool + sidewalk = 10 + 2 x
\n" ); document.write( "width of pool + sidewalk = 6 + 2 x
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\n" ); document.write( "( 10 + 2 x ) ( 6 + 2 x ) + -60 = 36
\n" ); document.write( "
\n" ); document.write( " 60 + 20 x + 12 x + 4 X^2 + -60 = 36
\n" ); document.write( " 4 X^2 + 32 x + -36 = 0
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\n" ); document.write( "\"4x%5E2%2B36x-4x-36=0\"\r
\n" ); document.write( "\n" ); document.write( "\"4x%28x%2B9%29-4%28x%2B9%29=0\"\r
\n" ); document.write( "\n" ); document.write( "(4x-4)(x+9)=0
\n" ); document.write( "4(x-1)(x+9)=0\r
\n" ); document.write( "\n" ); document.write( "x=1 OR -9
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\n" ); document.write( " Ignore negative value
\n" ); document.write( " width of sidewalk = 1 ft
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