document.write( "Question 242913: A concrete border of uniform width is constructed around a rectangular flower bed that is 12ft by 9 ft. Find the width of the border if the area formed by the flower bed and the border is 154 sq ft.\r
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Algebra.Com's Answer #177894 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
(12+2x)(9+2x)=154
\n" ); document.write( "108+18x+24x+4x^2=154
\n" ); document.write( "4x^2+42x+108-154=0
\n" ); document.write( "4x^2+42x-46=0
\n" ); document.write( "(4x-4)(x+11.5)=0
\n" ); document.write( "4x-4=0
\n" ); document.write( "4x=4
\n" ); document.write( "x=4/4
\n" ); document.write( "x=1 ft. ans. for the width of the border.
\n" ); document.write( "Proof:
\n" ); document.write( "(12+2)(9+2)=154
\n" ); document.write( "14*11=154
\n" ); document.write( "154=154
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