document.write( "Question 976816: there are 48 coins consisting of nickels and dimes. if the total value of the coins is $3.90 , how many nickels are there \n" ); document.write( "
Algebra.Com's Answer #598314 by FrankM(1040)\"\" \"About 
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We can set this up with a single variable, N for number of Nickles. (And 48-N will be dimes)\r
\n" ); document.write( "\n" ); document.write( "5N+10(48-N)=390\r
\n" ); document.write( "\n" ); document.write( "5N+480-10N=390\r
\n" ); document.write( "\n" ); document.write( "-5N=-90\r
\n" ); document.write( "\n" ); document.write( "N=18, 48-N= 30\r
\n" ); document.write( "\n" ); document.write( "30 dimes are $3.00 18 nickles, $.90.
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