document.write( "Question 1091589: Carlos has a box of coins that he uses when playing poker with friends. The box currently contains 39 coins, consisting of pennies, dimes, and quarters. The number of pennies is equal to the number of dimes, and the total value is $3.90. How many of each denomination of coin does he have?
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Algebra.Com's Answer #706007 by jorel1380(3719) You can put this solution on YOUR website! Let p be pennies, d be dimes, and q be quarters. The number of pennies is equal to the number of dimes, so p=d. Then: \n" ); document.write( "p+d+q=39 \n" ); document.write( "2p+q=39 and \n" ); document.write( "1p+10d+25q=390 \n" ); document.write( "1p+10p+25q=390 \n" ); document.write( "So: \n" ); document.write( "2p+q=39 \n" ); document.write( "11p+25q=390 \n" ); document.write( "Then solve for p and q. ☺☺☺☺ \n" ); document.write( " |