document.write( "Question 354515: solve by substitution: 1/3x + 1/5y= 8/15 and 1/3x + 4y =70/3 \n" ); document.write( "
Algebra.Com's Answer #253320 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "First thing to do is to clear of fractions,\r\n" );
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document.write( "To clear \r\n" );
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document.write( "\"expr%281%2F3%29x+%2B+expr%281%2F5%29y=+8%2F15\"\r\n" );
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document.write( "of fractions multiply through every term by LCD of 15\r\n" );
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document.write( "\"red%2815%29expr%281%2F3%29x+%2B+red%2815%29expr%281%2F5%29y=+red%2815%29expr%288%2F15%29\"\r\n" );
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document.write( "and get \r\n" );
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document.write( "\"5x+%2B+3y+=+8\"\r\n" );
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document.write( "---\r\n" );
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document.write( "To clear \r\n" );
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document.write( "\"expr%281%2F3%29x+%2B+4y+=70%2F3\"\r\n" );
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document.write( "of fractions multiply through every term by LCD of 3\r\n" );
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document.write( "\"red%283%29expr%281%2F3%29x+%2B+red%283%294y=+red%283%29expr%2870%2F3%29\"\r\n" );
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document.write( "and get \r\n" );
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document.write( "\"x+%2B+12y+=+70\"\r\n" );
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document.write( "Then the system becomes easier to solve:\r\n" );
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document.write( "\"system%285x+%2B+3y+=+8%2C%0D%0Ax+%2B+12y+=+70%29\"\r\n" );
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document.write( "Can you solve that by yourself?  If not post again.\r\n" );
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document.write( "Solution: (x,y) = (-2,6)\r\n" );
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document.write( "Edwin
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