document.write( "Question 1016450: An old jar of dimes and quarters contains 200 coins total, and the value of all the coins is $42.50. How many quarters are in the jar? \n" ); document.write( "
Algebra.Com's Answer #632833 by fractalier(6550)\"\" \"About 
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Call the numbers of dimes and quarters, d and q. Then we have
\n" ); document.write( "d + q = 200 and the value equation becomes
\n" ); document.write( "10d + 25q = 4250 (we work in cents)
\n" ); document.write( "Now multiply the first equation by ten and subtract...
\n" ); document.write( "10d + 25q = 4250
\n" ); document.write( "-(10d + 10q = 2000)
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\n" ); document.write( "15q = 2250
\n" ); document.write( "q = 150 quarters
\n" ); document.write( "d = 50 dimes
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