document.write( "Question 950486: From the coffee machine, Giorgio collected a total of 76 dimes and quarters. Their total value amounted to $13.00. How many dimes were there? \n" ); document.write( "
Algebra.Com's Answer #580421 by macston(5194)![]() ![]() You can put this solution on YOUR website! d=dimes; q=quarters; \n" ); document.write( "d+q=76 \n" ); document.write( "d=76-q \n" ); document.write( "$0.10d+$0.25q=$13.00 Substitute for d. \n" ); document.write( "$0.10(76-q)+$0.25q=$13.00 \n" ); document.write( "$7.60-$0.10q+$0.25q=$13.00 Subtract $7.60 from each side. \n" ); document.write( "$0.15q=$5.40 Divide each side by $0.15 \n" ); document.write( "q=36 ANSWER 1: There were 36 quarters. \n" ); document.write( "d=76-q=76=36=40 ANSWER 2: There were 40 dimes \n" ); document.write( "CHECK \n" ); document.write( "$0.10d+$0.25q=$13.00 \n" ); document.write( "$0.10(40)+$0.25(36)=$13.00 \n" ); document.write( "$4.00+$9.00=$13.00 \n" ); document.write( "$13.00=$13.00\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |