document.write( "Question 678282: The sum of two numbers is 72, and twice their difference is 24. What is the smaller of the two munbers? \r
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document.write( "30
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document.write( "48
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document.write( "42
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document.write( "24 \n" );
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Algebra.Com's Answer #421251 by rm29924(97)![]() ![]() You can put this solution on YOUR website! The answer is 30. \n" ); document.write( "let x=the larger number \n" ); document.write( "let y= the smaller number \n" ); document.write( "x+y=72 \n" ); document.write( "2(x-y)=24 \n" ); document.write( "Take the first equation and get x by itself. \n" ); document.write( "x+y=72 \n" ); document.write( "x=72-y \n" ); document.write( "Then plug in that value for x in the second equation. \n" ); document.write( "2(72-y-y)=24 \n" ); document.write( "144-2y-2y=24 \n" ); document.write( "144-4y=24 \n" ); document.write( "-4y=-120 \n" ); document.write( "y=30\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |