document.write( "Question 1134859: Katie brought some pens for $2.00 each and some pencils for $0.05 cents each. She brought twice as may pens as pencils and spent a total of $13.50. How many each did she buy ? \n" ); document.write( "
Algebra.Com's Answer #752349 by josgarithmetic(39625)\"\" \"About 
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recheck the problem description.\r
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\n" ); document.write( "\n" ); document.write( "p pens
\n" ); document.write( "L penciLs\r
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\n" ); document.write( "\n" ); document.write( "Account for the cost:
\n" ); document.write( "\"2p%2B0.05L=13.5\"\r
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\n" ); document.write( "\n" ); document.write( "Account for relation between pens and pencils:
\n" ); document.write( "\"2=p%2FL\"\r
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\n" ); document.write( "\n" ); document.write( "Simple algebra between p and L,
\n" ); document.write( "\"p=2L\"\r
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\n" ); document.write( "\n" ); document.write( "Substitute into the cost equation:
\n" ); document.write( "\"2%2A2L%2B0.05L=13.5\"
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\n" ); document.write( "\"4L%2B0.05L=13.5\"
\n" ); document.write( "\"4.05L=13.5\"
\n" ); document.write( "\"L=13.5%2F4.05\"\r
\n" ); document.write( "\n" ); document.write( "\"L=3%261%2F3\", but this is not a whole number; and both L and p must be whole numbers.
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