document.write( "Question 387730: Joe has a collection of nickels and dimes that is worth $2.10. If the number of dimes was tripled and the number of nickels was increased by 24, the value of the coins would be $6.30. How many nickels and dimes does he have? \r
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Algebra.Com's Answer #274099 by edjones(8007)\"\" \"About 
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Let n=number of nickels and d=number of dimes.
\n" ); document.write( ".05n+.1d=2.10
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\n" ); document.write( ".05(n+24)+.1*3d=6.30
\n" ); document.write( ".05n+1.2+.3d=630
\n" ); document.write( ".05n+.3d=5.10
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\n" ); document.write( ".05n+.3d=5.10
\n" ); document.write( ".05n+.1d=2.10
\n" ); document.write( "----------------subtract
\n" ); document.write( "===>.2d=3.00
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\n" ); document.write( "d=15
\n" ); document.write( "n=12
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