document.write( "Question 972980: Nick has $7.70 in quarters and dimes, and the total number of coins is 38. How many quarters and how many dimes? \n" ); document.write( "
Algebra.Com's Answer #595255 by macston(5194)\"\" \"About 
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Q=number of quarters; D=number of dimes
\n" ); document.write( "Q+D=38
\n" ); document.write( "D=38-Q Use this to substitute for D.
\n" ); document.write( ".
\n" ); document.write( "$0.25Q+$0.10D=$7.70 Substitute for D.
\n" ); document.write( "$0.25Q+$0.10(38-Q)=$7.70
\n" ); document.write( "$0.25Q+$3.80-$0.10Q=$7.70
\n" ); document.write( "$0.15Q=$3.90
\n" ); document.write( "Q=26 ANSWER 1: There are 26 quarters.
\n" ); document.write( "D=38-Q=38-26=12 ANSWER 2: There are 12 dimes
\n" ); document.write( ".
\n" ); document.write( "CHECK:
\n" ); document.write( "$0.25Q+$0.10D=$7.70
\n" ); document.write( "$0.25(26)+$0.10(12)=$7.70
\n" ); document.write( "$6.50+$1.20=$7.70
\n" ); document.write( "$7.70=$7.70
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