document.write( "Question 335409: A cash register contains only five dollar and ten dollar bills. It contains twice as many five's as ten's and the total amount of money in the cash register is 540 dollars. How many ten's are in the cash register?
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Algebra.Com's Answer #240509 by Fombitz(32388) $\"\"$ $\"About$

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Let T be the number of $10 bills, F the number of $5 bills.
\n" ); document.write( "1. $\"F=2T\"$
\n" ); document.write( "2. $\"10T%2B5F=540\"$
\n" ); document.write( "Substitute eq. 1 into eq. 2,
\n" ); document.write( " $\"10T%2B5%282T%29=540\"$
\n" ); document.write( " $\"20T=540\"$
\n" ); document.write( " $\"highlight%28T=27%29\"$
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