document.write( "Question 306320: A person has 17 coins, all nickels and dimes, worth $1.25. How many nickels are there?\r
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Algebra.Com's Answer #219252 by scott8148(6628)\"\" \"About 
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n + d = 17 ___ d = 17 - n\r
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\n" ); document.write( "\n" ); document.write( "10d + 5n = 125\r
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\n" ); document.write( "\n" ); document.write( "substituting ___ 10(17 - n) + 5n = 125 ___ 170 - 10n + 5n = 125\r
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\n" ); document.write( "\n" ); document.write( "45 = 5n ___ 9 = n
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