document.write( "Question 831086: #1. A man built a walk of uniform width around a rectangular pool. If the area of the walk is 315 square feet and the dimensions of the pool are 8 feet by 18 feet, how wide is the walk? \n" ); document.write( "
Algebra.Com's Answer #501177 by richwmiller(17219)\"\" \"About 
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(8+x)*(18+x)=8*18+315
\n" ); document.write( "(x+8) (x+18) = 459
\n" ); document.write( "x^2+26 x+144 = 459
\n" ); document.write( "x^2+26 x-315 = 0
\n" ); document.write( "x = -35 disregard negative answers
\n" ); document.write( "x = 9 ft
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