document.write( "Question 756309: A bank teller had 125 $10 and $5 bills to start a day. If the total value of the bills was $1000 how many $5 bills did he have? \n" ); document.write( "

Algebra.Com's Answer #460124 by Edwin McCravy(20060) $\"\"$ $\"About$

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document.write( "Without algebra (you can do it in your head this way):\r\n" );
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document.write( "If he had only $5 bills he would have 1000÷5 or 200 bills.  But since\r\n" );
document.write( "he had only 125 bills, then 200-125 or 75 of them had to be worth twice \r\n" );
document.write( "as much as a $5.  So he had 75 tens and 125-75 = 50 fives. \r\n" );
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document.write( "With algebra  (which is the way your teacher wants you to do it)\r\n" );
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document.write( "The other tutor used two unknowns, but it can be done with only 1 unknown.\r\n" );
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document.write( "Let x = the number of $5 bills.\r\n" );
document.write( "Then the number of $10 is 125-x\r\n" );
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document.write( "So\r\n" );
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document.write( "            \r\n" );
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document.write( "            5·x + 10·(125-x) = 1000\r\n" );
document.write( "             5x + 1250 - 10x = 1000\r\n" );
document.write( "                         -5x = -250\r\n" );
document.write( "                           x = 50\r\n" );
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document.write( "Edwin

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