document.write( "Question 279354: jack and betty have 28 coins that are nickels and dimes if the value of the coins is $1.95 how many coins of each type do they have\r
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Algebra.Com's Answer #203123 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"d\"$ = number of dimes
\n" ); document.write( "Let $\"n\"$ = number of nickels
\n" ); document.write( "given:
\n" ); document.write( " $\"10d+%2B+5n+=+195\"$
\n" ); document.write( " $\"n+%2B+d+=+28\"$
\n" ); document.write( "----------------
\n" ); document.write( " $\"d+=+28+-+n\"$
\n" ); document.write( "and
\n" ); document.write( " $\"10%2A%2828+-+n%29+%2B+5n+=+195\"$
\n" ); document.write( " $\"280++-+10n+%2B+5n+=+195\"$
\n" ); document.write( " $\"5n+=+280+-+195\"$
\n" ); document.write( " $\"5n+=+85\"$
\n" ); document.write( " $\"n=+17\"$
\n" ); document.write( "and
\n" ); document.write( " $\"n+%2B+d+=+28\"$
\n" ); document.write( " $\"17+%2B+d+=+28\"$
\n" ); document.write( " $\"d+=+11\"$
\n" ); document.write( "They have 17 nickels and 11 dimes
\n" ); document.write( "check answer:
\n" ); document.write( " $\"10d+%2B+5n+=+195\"$
\n" ); document.write( " $\"10%2A11+%2B+5%2A17+=+195\"$
\n" ); document.write( " $\"110+%2B+85+=+195\"$
\n" ); document.write( " $\"195+=+195\"$
\n" ); document.write( "OK \n" ); document.write( "

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