document.write( "Question 977923: The sum of two digits of a two digit number is 15. If 9 is added to it, the digits are reversed. Find the number. \n" ); document.write( "
Algebra.Com's Answer #599430 by richwmiller(17219)\"\" \"About 
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a+b=15
\n" ); document.write( "10*a+b+9=10*b+a
\n" ); document.write( "9a+9=9b
\n" ); document.write( "a+1=b
\n" ); document.write( "a+a+1=15
\n" ); document.write( "2a=14
\n" ); document.write( "a=7
\n" ); document.write( "b=8
\n" ); document.write( "the number is 78
\n" ); document.write( "check
\n" ); document.write( "78+9=87\r
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