document.write( "Question 1007658: For a particular two digit number, the value of the number is 9 more than when the digits are reversed. In fact, if you add 4 to the first digit it is the same as doubling the second digit. \n" ); document.write( "
Algebra.Com's Answer #623559 by stanbon(75887)\"\" \"About 
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For a particular two digit number, the value of the number is 9 more than when the digits are reversed. In fact, if you add 4 to the first digit it is the same as doubling the second digit.
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\n" ); document.write( "Let the number be 10t+u
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\n" ); document.write( "Equations:
\n" ); document.write( "10t+u = 10u+t + 9
\n" ); document.write( "t+4 = 2u
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\n" ); document.write( "Substitute for \"t\" and solve for \"u\"::
\n" ); document.write( "10(2u-4) + u = 10u+2u-4 + 9
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\n" ); document.write( "21u - 40 = 12u + 5
\n" ); document.write( "9u = 45
\n" ); document.write( "u = 5
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\n" ); document.write( "t = 2u-4 = 6
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\n" ); document.write( "Ans: number = 65
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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