document.write( "Question 995362: The sum of the digits of a two digit number is 12. The tens digit is 2 less than the units digit. Find the number.
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Algebra.Com's Answer #614109 by rothauserc(4718)\"\" \"About 
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we have the following equations
\n" ); document.write( "x1 + x2 = 12
\n" ); document.write( "x1 = x2-2
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\n" ); document.write( "substitute for x1 in first equation
\n" ); document.write( "x2-2 +x2 = 12
\n" ); document.write( "2x2 = 14
\n" ); document.write( "x2 = 7
\n" ); document.write( "x1 = 5
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\n" ); document.write( "the two digit number is 57
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