document.write( "Question 993331: Mary has a piggy bank in which she has saved only dimes and quarters. She has 17 coins in the bank worth $2.45. How many coins of each type does she have?
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Algebra.Com's Answer #807719 by CubeyThePenguin(3113)![]() ![]() You can put this solution on YOUR website! d = number of dimes \n" ); document.write( "q = number of quarters\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "d + q = 17 \n" ); document.write( "10d + 25q = 245\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Multiply the first equation by 25.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "25d + 25q = 425 \n" ); document.write( "-(10d + 25q = 245) \n" ); document.write( "--------------------- \n" ); document.write( "15d = 180 \n" ); document.write( "d = 12\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Mary has 12 dimes and 5 quarters. \n" ); document.write( " |