document.write( "Question 933770: a parking lot meter contains 47 coins in dimes and quarters for a total of 5.45 . how many of each coin does the meter contain. \n" ); document.write( "

Algebra.Com's Answer #567076 by Fombitz(32388) $\"\"$ $\"About$

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1. $\"D%2BQ=47\"$
\n" ); document.write( "2. $\"10D%2B25Q=545\"$
\n" ); document.write( "From eq. 1,
\n" ); document.write( " $\"10D%2B10Q=470\"$
\n" ); document.write( " $\"10D=470-10Q\"$
\n" ); document.write( "Substitute,
\n" ); document.write( " $\"470-10Q%2B25Q=545\"$
\n" ); document.write( " $\"15Q=75\"$
\n" ); document.write( " $\"Q=5\"$
\n" ); document.write( "Then,
\n" ); document.write( " $\"D%2B5=47\"$
\n" ); document.write( " $\"D=42\"$
\n" ); document.write( "Forty two dimes and five quarters \n" ); document.write( "

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