document.write( "Question 1163122: An urn contains x red balls and y green balls. if a ball is taken at random from the urn, the probability that it is red is 3/7. Write down an equation connecting x and y. if there had been 5 more red balls, the probability would have been 1/2. find x and y. \n" ); document.write( "
Algebra.Com's Answer #787109 by Edwin McCravy(20054)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Instead of doing your problem for you, I'll do one exactly like it with\r\n" );
document.write( "different numbers.  I'll do this one instead:\r\n" );
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document.write( "An urn contains x red balls and y green balls. if a ball is taken at random\r\n" );
document.write( "from the urn, the probability that it is red is 3/5. Write down an equation\r\n" );
document.write( "connecting x and y. if there had been 6 more red balls, the probability\r\n" );
document.write( "would have been 9/13. find x and y.\r\n" );
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document.write( "An urn contains x red balls and y green balls. if a ball is taken at random\r\n" );
document.write( "from the urn, the probability that it is red is 3/5.\r\n" );
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document.write( "\"x%2F%28x%2By%29=3%2F5\"\r\n" );
document.write( "\"5x=3x%2B3y\"\r\n" );
document.write( "\"2x=3y\"\r\n" );
document.write( "\"x=3y%2F2\"\r\n" );
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document.write( "If there had been 6 more red balls, the probability would have been 9/13. find x and y.\r\n" );
document.write( "\r\n" );
document.write( "\"%28x%2B6%29%2F%28x%2By%2B6%29=9%2F13\"\r\n" );
document.write( "\"13x%2B78=9x%2B9y%2B54\"\r\n" );
document.write( "\"4x-9y=-24\"\r\n" );
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document.write( "Substituting 3y/2 for x in\r\n" );
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document.write( "\"4x-9y=-24\"\r\n" );
document.write( "\"4%283y%2F2%29-9y=-24\"\r\n" );
document.write( "\"6y-9y=-24\"\r\n" );
document.write( "\"-3y=-24\"\r\n" );
document.write( "\"y=8\"\r\n" );
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document.write( "Substituting 8 for y in\r\n" );
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document.write( "\"x=3y%2F2\"\r\n" );
document.write( "\"x=3%288%29%2F2\"\r\n" );
document.write( "\"x=24%2F2\"\r\n" );
document.write( "\"x=12\"\r\n" );
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document.write( "Edwin
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