document.write( "Question 1063448: In the cushion of a couch, you find 22 coins, all nickels and dimes, totaling $1.70. How many of each coin do you have? \n" ); document.write( "
Algebra.Com's Answer #678534 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! x+y=22, where x=nickels and y=dimes \n" ); document.write( ".05x+.10y=1.70; multiply this by 100 to clear decimals \n" ); document.write( "5x+10y=170 \n" ); document.write( "-5x-5y=-110, multiplying the top by -5 \n" ); document.write( "5y=60 \n" ); document.write( "y=12 dimes or $1.20 \n" ); document.write( "x=10 nickels or $0.50 \n" ); document.write( "They add to $1.70 \n" ); document.write( " |