document.write( "Question 158960: Amber has 30 coins in nickles and dimes. In all she has $2.10. How many nickles and dimes does she have. \n" ); document.write( "
Algebra.Com's Answer #117085 by checkley77(12844) ![]() You can put this solution on YOUR website! N+D=30 OR N=30-D \n" ); document.write( ".05N+.10D=2.10 \n" ); document.write( ".05(30-D)+.10D=2.10 \n" ); document.write( "1.50-.05D+.10D=2.10 \n" ); document.write( ".05D=2.10-1.50 \n" ); document.write( ".05D=.60 \n" ); document.write( "D=.60/.05 \n" ); document.write( "D=12 DIMES. \n" ); document.write( "N+12=30 \n" ); document.write( "N=30-12 \n" ); document.write( "N=18 NICKLES. \n" ); document.write( "PROOF \n" ); document.write( ".05*18+.10*12=2.10 \n" ); document.write( ".90+1.20=2.10 \n" ); document.write( "2.10=2.10 \n" ); document.write( " |