document.write( "Question 144857: Tamara has 12 coins consisting of quarters and dimes. The total value of the coin is is $ 1.80. How many quarters and dimes does she have in her pocket?
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Algebra.Com's Answer #105563 by checkley77(12844) ![]() You can put this solution on YOUR website! Q+D=12 OR Q=12-D \n" ); document.write( ".25Q+.10D=1.80 \n" ); document.write( ".25(12-D)+.10D=1.80 \n" ); document.write( "3-.25D+.10D=1.80 \n" ); document.write( "-.15D=1.80-3 \n" ); document.write( "-.15D=-1.20 \n" ); document.write( "D=-1.20/-.15 \n" ); document.write( "D=8 IS THE NUMBER OF DIMES. \n" ); document.write( "Q+8=12 \n" ); document.write( "Q=12-8 \n" ); document.write( "Q=4 IS THE NUMBER OF QUARTERS. \n" ); document.write( "PROOF \n" ); document.write( ".25*4+.10*8=1.80 \n" ); document.write( "1+.80=1.80 \n" ); document.write( "1.80=1.80 \n" ); document.write( " \n" ); document.write( " |