document.write( "Question 957237: Marta has $1.70 in quarters and dimes. She has 8 coins altogether. How many coins of each kind does she have? \n" ); document.write( "
Algebra.Com's Answer #584887 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! Q+D=8 OR Q=8-D \n" ); document.write( ".25Q+.10D=1.70 \n" ); document.write( ".25(8-D)+.10D=1.70 \n" ); document.write( "2.00-.25D+.10D=1.70 \n" ); document.write( "-.15D=1.70-2.00 \n" ); document.write( "-.15D=-.30 \n" ); document.write( "D=-.30/-.15 \n" ); document.write( "D=2 DIMES. \n" ); document.write( "Q+2=8 \n" ); document.write( "Q=6 QUARTERS. \n" ); document.write( "PROOF: \n" ); document.write( ".25*6+2*.10=1.70 \n" ); document.write( "1.50+.20=1.70 \n" ); document.write( "1.70=1.70 \n" ); document.write( " \n" ); document.write( " |