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) You can put this solution on YOUR website! 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 \n" ); document.write( " \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 \n" ); document.write( " \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 \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |