document.write( "Question 379625: A book costs twice a pen. The pen and the book together cost Rs.48. What is the cost of each item? Form an equation and solve. \n" ); document.write( "

Algebra.Com's Answer #269558 by Fombitz(32388) $\"\"$ $\"About$

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Let B be the cost of the book, P the cost of the pen.
\n" ); document.write( "1. $\"B=2P\"$
\n" ); document.write( "2. $\"P%2BB=48\"$
\n" ); document.write( "Substitute using eq. 1,
\n" ); document.write( " $\"P%2B2P=48\"$
\n" ); document.write( " $\"3P=48\"$
\n" ); document.write( " $\"highlight%28P=16%29\"$
\n" ); document.write( "Then from eq. 1,
\n" ); document.write( " $\"B=2%2816%29\"$
\n" ); document.write( " $\"highlight%28B=32%29\"$
\n" ); document.write( " \n" ); document.write( "

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