document.write( "Question 859236: The sum of the digits of a certain two-digit number is 7. Reversing its digits increases the number by 9.
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Algebra.Com's Answer #517659 by edjones(8007)\"\" \"About 
You can put this solution on YOUR website!
Let u=the units digit and t=the tens digit. The digit = 10t+u
\n" ); document.write( "t+u=7
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\n" ); document.write( "10t+u=10u+t-9
\n" ); document.write( "9t-9u=-9
\n" ); document.write( "9(t-u)=-9
\n" ); document.write( "t-u=-1
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\n" ); document.write( "t+u=7
\n" ); document.write( "t-u=-1
\n" ); document.write( "-------Add
\n" ); document.write( "2t=6
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\n" ); document.write( "t=3
\n" ); document.write( "u=4
\n" ); document.write( "The number is 34.
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\n" ); document.write( "Ed\r
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