document.write( "Question 987811: You have 20 coins (dimes and quarters) total. They total $3.05. How many dimes and quarters do you have? \n" ); document.write( "
Algebra.Com's Answer #807953 by CubeyThePenguin(3113)![]() ![]() You can put this solution on YOUR website! d = number of dimes \n" ); document.write( "q = number of quarters\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "d + q = 20 \n" ); document.write( "10d + 25q = 305\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Multiply the first equation by 25.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "25d + 25q = 500 \n" ); document.write( "-(10d + 25q = 305) \n" ); document.write( "-------------------------- \n" ); document.write( "15d = 195 \n" ); document.write( "d = 13\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "You have 13 dimes and 7 quarters. \n" ); document.write( " |