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 #460120 by Cromlix(4381)\"\" \"About 
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$10 bills = x
\n" ); document.write( "$5 bills = y\r
\n" ); document.write( "\n" ); document.write( " x + y = 125.....1
\n" ); document.write( "10x + 5y = 1000....2
\n" ); document.write( "Multiply (1) by 5\r
\n" ); document.write( "\n" ); document.write( " 5x + 5y = 625.....3
\n" ); document.write( "10x + 5y = 1000....2\r
\n" ); document.write( "\n" ); document.write( "Subtract (3) from (2)\r
\n" ); document.write( "\n" ); document.write( " 5x = 375
\n" ); document.write( " x = 75
\n" ); document.write( "Substitute x = 75 into Eq (1)\r
\n" ); document.write( "\n" ); document.write( " x + y = 125
\n" ); document.write( " 75 + y = 125
\n" ); document.write( " y = 125 - 75
\n" ); document.write( " y = 50
\n" ); document.write( "Therefore the teller has:
\n" ); document.write( "75 $10 bills and 50 $5 bills.
\n" ); document.write( "Proof
\n" ); document.write( "75*$10 + 50*$5 = $1000
\n" ); document.write( "Hope this helps
\n" ); document.write( ":-) \n" ); document.write( "
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