document.write( "Question 336316: A cash register contains only five dollar and ten dollar bills. It contains twice as many fives as tens and the total amount of money in the cash register is 720 dollars. How many tens are in the cash register? \n" ); document.write( "
Algebra.Com's Answer #241133 by checkley77(12844) ![]() You can put this solution on YOUR website! 2X*5+X*10=720 \n" ); document.write( "10X+10X=720 \n" ); document.write( "20X=720 \n" ); document.write( "X=720/20 \n" ); document.write( "X=36 TENS. \n" ); document.write( "2*36=72 FIVES. \n" ); document.write( "PROOF: \n" ); document.write( "72*5+36*10=720 \n" ); document.write( "360+360=720 \n" ); document.write( "720=720 \n" ); document.write( " |