document.write( "Question 773556: a piggy bank contains 30 coins, all dimes and quarters worth 5.70. how many dimes and quarters are in the bank? \n" ); document.write( "
Algebra.Com's Answer #471658 by tommyt3rd(5050)\"\" \"About 
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D+Q=30
\n" ); document.write( ".1D+.25Q=5.7 (m by 20)\r
\n" ); document.write( "\n" ); document.write( "D+Q=30
\n" ); document.write( "2D+5Q=114\r
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\n" ); document.write( "\n" ); document.write( "D+Q=30 (m by -2)
\n" ); document.write( "2D+5Q=114\r
\n" ); document.write( "\n" ); document.write( "-2D-2Q=-60
\n" ); document.write( "2D+5Q=114\r
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\n" ); document.write( "\n" ); document.write( "adding...\r
\n" ); document.write( "\n" ); document.write( "3Q=54
\n" ); document.write( "Q=18\r
\n" ); document.write( "\n" ); document.write( "D=30-18=12\r
\n" ); document.write( "\n" ); document.write( "12 dimes, 18 quarters\r
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