document.write( "Question 973482: Mr. Smith has $4.90 in dimes and quarters in his wallet. If he has 7 more quarters than dimes how many of each coin does he have? \n" ); document.write( "
Algebra.Com's Answer #808008 by CubeyThePenguin(3113)\"\" \"About 
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d = number of dimes
\n" ); document.write( "q = number of quarters\r
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\n" ); document.write( "\n" ); document.write( "10d + 25q = 490
\n" ); document.write( "q = d + 7\r
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\n" ); document.write( "\n" ); document.write( "Substitute the first equation into the second.\r
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\n" ); document.write( "\n" ); document.write( "10d + 25(d + 7) = 490
\n" ); document.write( "10d + 25d + 175 = 490
\n" ); document.write( "35d = 315
\n" ); document.write( "d = 9\r
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\n" ); document.write( "\n" ); document.write( "There are 9 dimes and 16 quarters.
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