document.write( "Question 687370: a cash register contains 15 coins in nickles and dimes. total value is $1.25. how many coins of each type are there? \n" ); document.write( "

Algebra.Com's Answer #425141 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+n+\"$ = number of nickels
\n" ); document.write( "Let $\"+d+\"$ = number of dimes
\n" ); document.write( "given:
\n" ); document.write( "(1) $\"+n+%2B+d+=+15+\"$
\n" ); document.write( "(2) $\"+5n+%2B+10d+=+125+\"$ ( in cents )
\n" ); document.write( "---------------------
\n" ); document.write( "(1) $\"+n+=+15+-+d+\"$
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+5%2A%28+15+-+d+%29+%2B+10d+=+125+\"$
\n" ); document.write( "(2) $\"+75+-+5d+%2B+10d+=+125+\"$
\n" ); document.write( "(2) $\"+5d+=+125+-+75+\"$
\n" ); document.write( "(2) $\"+5d+=+50+\"$
\n" ); document.write( "(2) $\"+d+=+10+\"$
\n" ); document.write( "and, since
\n" ); document.write( "(1) $\"+n+=+15+-+d+\"$
\n" ); document.write( "(1) $\"+n+=+15+-+10+\"$
\n" ); document.write( "(1) $\"+n+=+5+\"$
\n" ); document.write( "There are 10 dimes and 5 nickels
\n" ); document.write( "check:
\n" ); document.write( "(2) $\"+5n+%2B+10d+=+125+\"$
\n" ); document.write( "(2) $\"+5%2A5+%2B+10%2A10+=+125+\"$
\n" ); document.write( "(2) $\"+25+%2B+100+=+125+\"$
\n" ); document.write( "(20 $\"+125+=+125+\"$
\n" ); document.write( "OK\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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