document.write( "Question 320222: A pile of 40 coins consists of nickels and dimes. The total value of coins is $3.35. Find the number of nickels and the number of dimes. (Let x= the number of nickels and y= the number of dimes) \n" ); document.write( "
Algebra.Com's Answer #229367 by checkley77(12844)\"\" \"About 
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X+Y=40 OR X=40-Y
\n" ); document.write( ".05X+.10Y=3.35
\n" ); document.write( ".05(40-Y)+.10Y=3.35
\n" ); document.write( "2-.05Y+10Y=3.35
\n" ); document.write( ".05Y=3.35-2
\n" ); document.write( ".05Y=1.35
\n" ); document.write( "Y=1.35/.05
\n" ); document.write( "Y=27 DIMES.
\n" ); document.write( "X=40-27
\n" ); document.write( "X=13 NICKELS.
\n" ); document.write( "PROOF:
\n" ); document.write( ".05*13+.10*27=3.35
\n" ); document.write( ".65+2.70=3.35
\n" ); document.write( "3.35=3.35
\n" ); document.write( "
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