document.write( "Question 1130437: A mixture of nickels and quarters totals $9.90. There is a total of 50 coins. How many are quarters and how many are nickels? \n" ); document.write( "
Algebra.Com's Answer #747112 by josgarithmetic(39630)\"\" \"About 
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n+q=50
\n" ); document.write( "q=50-n\r
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\n" ); document.write( "\n" ); document.write( "\"5n%2B25%2850-n%29=990\"\r
\n" ); document.write( "\n" ); document.write( "\"5n-25n%2B25%2A50=990\"\r
\n" ); document.write( "\n" ); document.write( "\"-20n=990-25%2A50\"\r
\n" ); document.write( "\n" ); document.write( "\"n=13\"\r
\n" ); document.write( "\n" ); document.write( "-\r
\n" ); document.write( "\n" ); document.write( "\"q=37\"\r
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\n" ); document.write( "\n" ); document.write( "check: 0.05*13+0.25*37=9.9\r
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\n" ); document.write( "\n" ); document.write( "13 nickels and 37 quarters
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