document.write( "Question 311521: The area of a rectangle wall of a barn is 189 sq feet. Its length is 12 feet longer than the width. Find the length and width of the wall of the barn. \r
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Algebra.Com's Answer #222886 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
L=W+12
\n" ); document.write( "189=LW
\n" ); document.write( "189=(W+12)W
\n" ); document.write( "189=W^2+12W
\n" ); document.write( "W^2+12W-189=0
\n" ); document.write( "(W-9)(W+21)=0
\n" ); document.write( "W-9=0
\n" ); document.write( "W=9 ANS. FOR THE WIDTH
\n" ); document.write( "L=9+12=21 ANS. FOR THE LENGTH.
\n" ); document.write( "PROOF:
\n" ); document.write( "189=9*21
\n" ); document.write( "189=189
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