document.write( "Question 20511: When jessy emptied out his big jar of quarters and nickles he found 144 coins. If there was $28.40 in the jar, how many of each kind of coin was there? \n" ); document.write( "
Algebra.Com's Answer #9864 by Earlsdon(6294)\"\" \"About 
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Let x = the number of quarters ($0.25) and (144-x) = the number of nickels ($0.05) and they all add up to $28.40. So now you can write the necessary equation:
\n" ); document.write( "\"x%280.25%29+%2B+%28144-x%29%280.05%29+=+28.40\" Simplify and solve for x.
\n" ); document.write( "\"0.25x+%2B+7.2+-+0.05x+=+28.40\"
\n" ); document.write( "\"0.2x+%2B+7.2+=+28.4\" Subtract 7.2 from both sides.
\n" ); document.write( "\"0.2x+=+21.2\" Divide both sides by 0.2
\n" ); document.write( "\"x+=+106\"\r
\n" ); document.write( "\n" ); document.write( "There are 106 quarters and (144-106 = 38) 38 nickels.
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