document.write( "Question 1206419: The ratio of the price of a cassette to the price of a VCD was 1:5. Each VCD cost $25. On a certain day, the amount of money collected from the sale of both VCDs and cassettes was $6720. If the number of cassettes sold made up 1/5 of the total number of VCDs and cassettes sold, how many VCDs were sold on that day? \n" ); document.write( "

Algebra.Com's Answer #843878 by ikleyn(52847) $\"\"$ $\"About$

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\n" ); document.write( "The ratio of the price of a cassette to the price of a VCD was 1:5. Each VCD cost $25.
\n" ); document.write( "On a certain day, the amount of money collected from the sale of both VCDs and cassettes was $6720.
\n" ); document.write( "If the number of cassettes sold made up 1/5 of the total number of VCDs and cassettes sold,
\n" ); document.write( "how many VCDs were sold on that day?
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document.write( "Each VCD costs $25.  Hence, each cassette costs   = 5 dollars.\r\n" );
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document.write( "Let x be the number of cassette sold.  Then the number of VCD is 4x.\r\n" );
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document.write( "The total revenue equation is \r\n" );
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document.write( "    5*x + 25*(4x) = 6720  dollars.\r\n" );
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document.write( "Simplify and find x\r\n" );
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document.write( "    5x + 100x = 6720\r\n" );
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document.write( "      105x    = 6720\r\n" );
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document.write( "         x    = 6720/105 = 64.\r\n" );
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document.write( "ANSWER.  64 cassettes and 4*64 = 256 VCDs were sold that day.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved using one equation in one unknown.\r
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\n" ); document.write( "\n" ); document.write( "It also can be solved mentally using the grouping method,
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