document.write( "Question 682550: Please help me solve this: The perimeter of a rectangle is 10 ft. The width is 3ft less than the length. What is the area? \n" ); document.write( "

Algebra.Com's Answer #423229 by josmiceli(19441) $\"\"$ $\"About$

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$\"+P+=+10+\"$
\n" ); document.write( " $\"+W+=+L+-+3+\"$
\n" ); document.write( "The formula for perimeter is
\n" ); document.write( " $\"+P+=+2W+%2B+2L+\"$
\n" ); document.write( " $\"+10+=+2W+%2B+2L+\"$
\n" ); document.write( "and, by substitution:
\n" ); document.write( " $\"+10+=+2%2A%28+L-3+%29+%2B+2L+\"$
\n" ); document.write( " $\"+10+=+2L+-+6+%2B+2L+\"$
\n" ); document.write( " $\"+4L+=+16+\"$
\n" ); document.write( " $\"+L+=+4+\"$
\n" ); document.write( "and, since
\n" ); document.write( " $\"+W+=+L+-+3+\"$
\n" ); document.write( " $\"+W+=+4+-+3+\"$
\n" ); document.write( " $\"+W+=+1+\"$
\n" ); document.write( "The area is:
\n" ); document.write( " $\"+A+=+W%2AL+\"$
\n" ); document.write( " $\"+A+=+1%2A4+\"$
\n" ); document.write( " $\"+A+=+4+\"$ ft2
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