document.write( "Question 217208: A rectangular rug has a length that is three feet longer than its width. Its area is 130 square feet. What are its dimensions.\r
\n" ); document.write( "\n" ); document.write( "I know that the L is 13 and the Width has to be 10...but I don't know how to show it as a solved formula
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Algebra.Com's Answer #163792 by Earlsdon(6294)\"\" \"About 
You can put this solution on YOUR website!
Try this! L = Length and W = Width.
\n" ); document.write( "\"L+=+W%2B3\"
\n" ); document.write( "Area: L*W = 130 Substitute L = W+3.
\n" ); document.write( "\"%28W%2B3%29%2AW+=+130\"
\n" ); document.write( "\"W%5E2%2B3W+=+130\" Subtract 130 from both sides.
\n" ); document.write( "\"W%5E2%2B3W-130+=+0\" Factor the trinomial.
\n" ); document.write( "\"%28W-10%29%28W%2B13%29+=+0\"
\n" ); document.write( "\"w-10+=+0\" or \"W%2B13+=+0\" so...
\n" ); document.write( "\"W+=+10\" or \"W+=+-13\" Discard the negative solution as width is a positive value.
\n" ); document.write( "\"highlight%28W+=+10%29\" and:
\n" ); document.write( "\"L+=+W%2B3\"
\n" ); document.write( "\"highlight%28L+=+13%29\"
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