document.write( "Question 305753: The sum of the digits of a two digit number is 15. If the digits are reversed, the result exceeds the original number by 9.Find the original number.
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document.write( "I think the first equation is: x + y = 15 \n" );
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Algebra.Com's Answer #218868 by mananth(16946)![]() ![]() You can put this solution on YOUR website! \r \n" ); document.write( "\n" ); document.write( "Let the digits in the units place be y \n" ); document.write( "in tens place be x\r \n" ); document.write( "\n" ); document.write( "when reversed\r \n" ); document.write( "\n" ); document.write( "10y+x-9=10x+y\r \n" ); document.write( "\n" ); document.write( "9y-9x=9 \n" ); document.write( ". \n" ); document.write( "y-x=1 \n" ); document.write( "y+x=15\r \n" ); document.write( "\n" ); document.write( "2y=16\r \n" ); document.write( "\n" ); document.write( "y=8\r \n" ); document.write( "\n" ); document.write( "x= 7\r \n" ); document.write( "\n" ); document.write( "The number is 78 \n" ); document.write( " |