document.write( "Question 342344: A stack of pennies and dimes has a total value of $2.31. How many dimes are in the stack if there are twice as many dimes as pennies? \n" ); document.write( "
Algebra.Com's Answer #245014 by Fombitz(32388)\"\" \"About 
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Let D be the number of dimes, P the number of pennies.
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\n" ); document.write( "\"D=2P\"
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\n" ); document.write( "\"10D%2BP=231\"
\n" ); document.write( "\"10%282P%29%2BP=231\"
\n" ); document.write( "\"20P%2BP=231\"
\n" ); document.write( "\"21P=231\"
\n" ); document.write( "\"highlight%28P=11%29\"
\n" ); document.write( "Then from the first equation,
\n" ); document.write( "\"D=2%2811%29\"
\n" ); document.write( "\"highlight%28D=22%29\"
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