document.write( "Question 420983: here is my word problem:
\n" ); document.write( "Harris Teeter sold 45 tubes of toothpaste, Colgate at $8.50 each and Crest at $9.75 each. In all, $398.75 was taken in for toothpaste. How many of each kind were sold?
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Algebra.Com's Answer #294031 by nerdybill(7384)\"\" \"About 
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Harris Teeter sold 45 tubes of toothpaste, Colgate at $8.50 each and Crest at $9.75 each. In all, $398.75 was taken in for toothpaste. How many of each kind were sold?
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\n" ); document.write( "Let x = number sold at 8.50
\n" ); document.write( "then
\n" ); document.write( "45-x = number sold at 9.75
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\n" ); document.write( "8.50x + 9.75(45-x) = 398.75
\n" ); document.write( "8.50x + 438.75 - 9.75x = 398.75
\n" ); document.write( "8.50x - 9.75x = -40
\n" ); document.write( "-1.25x = -40
\n" ); document.write( "x = 32 (number sold at $8.50)
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\n" ); document.write( "number sold at $9.75
\n" ); document.write( "45-x = 45-32 = 13
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