document.write( "Question 810277: A jar of 13 coins has $1.25 in it. The coins are nickels and quarters. How many of each do I have? \n" ); document.write( "
Algebra.Com's Answer #488028 by erica65404(394)\"\" \"About 
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nickels=x quarters=y
\n" ); document.write( "x+y=13 coins
\n" ); document.write( "now keep in mind that quaters are .25 and nickels are .05.
\n" ); document.write( ".05x+.25y=1.25
\n" ); document.write( "solve the first equation for y then plug into the above equation to find the amount of nickels.
\n" ); document.write( "\"y=13-x\"
\n" ); document.write( "\".05x%2B.25%2813-x%29=1.25\"
\n" ); document.write( "\".05x%2B3.25-.25x=1.25\"
\n" ); document.write( "\"-.20x%2B3.25=1.25\"
\n" ); document.write( "\"-.20x=-2.00\"
\n" ); document.write( "\"x=10\"
\n" ); document.write( "we now know we have 10 nickels.
\n" ); document.write( "plug 10 into the first equation to find quarters
\n" ); document.write( "\"10%2By=13\"
\n" ); document.write( "we have 3 quarters and 10 nickels.
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