document.write( "Question 852120: a piece of a cable 180 feet long costs $67.50. How much will 500 feet cost at the same unit price? \n" ); document.write( "
Algebra.Com's Answer #513460 by LinnW(1048)\"\" \"About 
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67.50/180 = dollars per foot
\n" ); document.write( "= $0.375 per foot
\n" ); document.write( "500 * 0.375 = $187.50\r
\n" ); document.write( "\n" ); document.write( "Another way to solve is by proportion.
\n" ); document.write( "\"180%2F67.50+=+500%2Fx\"
\n" ); document.write( "\"180x=%2867.50%29%28500%29\"
\n" ); document.write( "\"180x=33750\"
\n" ); document.write( "divide by 180
\n" ); document.write( "\"x=33750\", x = 187.50
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