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)\"\" \"About 
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d = number of dimes
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\n" ); document.write( "\n" ); document.write( "d + q = 17
\n" ); document.write( "10d + 25q = 245\r
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\n" ); document.write( "\n" ); document.write( "Multiply the first equation by 25.\r
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\n" ); document.write( "\n" ); document.write( "25d + 25q = 425
\n" ); document.write( "-(10d + 25q = 245)
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\n" ); document.write( "15d = 180
\n" ); document.write( "d = 12\r
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\n" ); document.write( "\n" ); document.write( "Mary has 12 dimes and 5 quarters.
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