document.write( "Question 371197: On a table there are 30 coins. Some are quarters and some are dimes. Their value is $4.05. How many of each coin are there? \n" ); document.write( "
Algebra.Com's Answer #264449 by mananth(16946) You can put this solution on YOUR website! On a table there are 30 coins. Some are quarters and some are dimes. Their value is $4.05. How many of each coin are there?\r \n" ); document.write( "\n" ); document.write( "... \n" ); document.write( "let there be x quarters \n" ); document.write( "dimes will be balance = 30-x \n" ); document.write( ".. \n" ); document.write( "Value = $4.05 = 405 cents \n" ); document.write( ".. \n" ); document.write( "25x+10(30-x)=405 \n" ); document.write( "25x+300-10x=405 \n" ); document.write( "15x=405-300 \n" ); document.write( "15x=105 \n" ); document.write( "/15 \n" ); document.write( "15x/15 = 105/15 \n" ); document.write( "x=7 quarters \n" ); document.write( "dimes = 23 \n" ); document.write( "... \n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " |