document.write( "Question 440931: A collection of 70 coins consisting of dimes, quarters, and half-dollars has a value of $17.75. There are three times as many quarters as dimes. Find the number of each kind of coin. \n" ); document.write( "
Algebra.Com's Answer #304476 by jorel1380(3719)![]() ![]() You can put this solution on YOUR website! x+y+z=70;x=3y;4y+z=70 \n" ); document.write( ".25(3y)+.10y+.5z=17.75 \n" ); document.write( ".85y+.5z=17.75 \n" ); document.write( "85y+50z=1775 \n" ); document.write( "200y+50z=3500 \n" ); document.write( "---------------- \n" ); document.write( "115y=1725 \n" ); document.write( "y=15 \n" ); document.write( "x=45 \n" ); document.write( "z=10 \n" ); document.write( "There are 45 quarters, 15 dimes, and 10 half-dollars in the coin collection.. \n" ); document.write( " |