document.write( "Question 1072144: A cashier has a total of 94 bills, made up of tens and twenties. The total value of the money is $1340. How much of each kind does have? \n" ); document.write( "
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A cashier has a total of 94 bills, made up of tens and twenties. The total value of the money is $1340. How much of each kind does have?
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\n" ); document.write( "\n" ); document.write( "Let t=number of tens
\n" ); document.write( " v=number of twenties\r
\n" ); document.write( "\n" ); document.write( "t+v = 94 (1)
\n" ); document.write( "10t + 20v = 1340 (2)\r
\n" ); document.write( "\n" ); document.write( "multiply (1) by 10:
\n" ); document.write( "10t + 10v = 940
\n" ); document.write( "subtract this from (2):
\n" ); document.write( " 10t + 20v = 1340
\n" ); document.write( " -(10t +10v = 940 )
\n" ); document.write( " 10v = 400\r
\n" ); document.write( "\n" ); document.write( "v = 400/10 = 40 —> t = 94-40 = 54\r
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\n" ); document.write( " Ans: The cashier has 54 tens and 40 twenties
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\n" ); document.write( "Check: 54*10 + 40*20 = 540 + 800 = 1340 \r
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