document.write( "Question 1107663: Hi
\n" ); document.write( "there were 610 watches and pens in a box. 1/5 of the watches and 1/3 of the pens were from Japan.
\n" ); document.write( "The rest korea. If a total of 150 watches and pens were from Japan, \r
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Algebra.Com's Answer #722685 by Theo(13342)\"\" \"About 
You can put this solution on YOUR website!
let w = number of watches.
\n" ); document.write( "let p = number of pens.\r
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\n" ); document.write( "\n" ); document.write( "w + p = 610\r
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\n" ); document.write( "\n" ); document.write( "1/5 of the watches and 1/3 of the pens were from japan.
\n" ); document.write( "a total of 150 watches and pens were from japan.\r
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\n" ); document.write( "\n" ); document.write( "1/5 * w + 1/3 * p = 150\r
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\n" ); document.write( "\n" ); document.write( "these 2 equations need to be solved simultaneously.\r
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\n" ); document.write( "\n" ); document.write( "leave the first equation as is and multiply both sides of the second equation by 5 to get:\r
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\n" ); document.write( "\n" ); document.write( "w + p = 610
\n" ); document.write( "w + 5/3 * p = 750\r
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\n" ); document.write( "\n" ); document.write( "subtract the first equation from the second to get:\r
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\n" ); document.write( "\n" ); document.write( "2/3 * p = 140.\r
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\n" ); document.write( "\n" ); document.write( "solve for p to get 210.\r
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\n" ); document.write( "\n" ); document.write( "if w + p = 610, and p = 210, then w must be equal to 400.\r
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\n" ); document.write( "\n" ); document.write( "you get w + p = 400 + 210 = 610.\r
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\n" ); document.write( "\n" ); document.write( "you get 1/5 * w + 1/3 * p = 1/5 * 400 + 1/3 * 210 = 80 + 70 = 150.\r
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\n" ); document.write( "\n" ); document.write( "this confirms that the solutions are correct because the original equations are both true when w = 400 and p = 210.\r
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\n" ); document.write( "\n" ); document.write( "you were asked:\r
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\n" ); document.write( "\n" ); document.write( "how many watches in the box?
\n" ); document.write( "how many pens from Korea? \r
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\n" ); document.write( "\n" ); document.write( "since w = the number of watches, then the number of watches in the box = 400.\r
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\n" ); document.write( "\n" ); document.write( "since p = the number of pens in the box, and since 1/3 of the pens in the box were from japan, then 2/3 of the pens in the box were from korea.\r
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\n" ); document.write( "\n" ); document.write( "2/3 * p = 2/3 * 210 = 140.\r
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\n" ); document.write( "\n" ); document.write( "your solution is:\r
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\n" ); document.write( "\n" ); document.write( "the number of watches in the box was 400.\r
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\n" ); document.write( "\n" ); document.write( "the number of pens in the box from korea was 140.\r
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\n" ); document.write( "\n" ); document.write( "if you drew a table of what was in the box, it would look something like this:\r
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document.write( "                       watches             pens           total\r\n" );
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document.write( "japan                    80                 70             150\r\n" );
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document.write( "korea                   320                140             460\r\n" );
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document.write( "total                   400                210             610\r\n" );
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