document.write( "Question 305756: 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 #218880 by themathtutor2009(81)![]() ![]() ![]() You can put this solution on YOUR website! x+y=15 \n" ); document.write( "10y+x=10x+y+9\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x+y=15 \n" ); document.write( "y=15-x\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "10y+x=10x+y+9 \n" ); document.write( "10(15-x)+x=10x+15-x+9 \n" ); document.write( "150-10x+x=10x+15-x+9 \n" ); document.write( "150-9x=9x+24 \n" ); document.write( "150-24=9x+9x \n" ); document.write( "126=18x \n" ); document.write( "126/18=x \n" ); document.write( "7=x \n" ); document.write( "x=7\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "y=15-x=15-7=8\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Answer: number is 78\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |