document.write( "Question 258138: the units digit of a two digit number exceeds twice the tens digit by 1. find the number if the sum of its digits is 10 \n" ); document.write( "

Algebra.Com's Answer #190008 by drk(1908) $\"\"$ $\"About$

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We have two equations
\n" ); document.write( "(i) $\"u+=+2t+%2B+1\"$
\n" ); document.write( "(ii) $\"u+%2B+t+=+10\"$
\n" ); document.write( "by substitution, we get
\n" ); document.write( "(iii) $\"2t+%2B+1+%2B+t+=+10\"$
\n" ); document.write( "Solving for t, we get
\n" ); document.write( "(iv) $\"3t+%2B+1+=+10\"$
\n" ); document.write( "(v) $\"3t+=+9\"$
\n" ); document.write( " $\"t+=+3\"$
\n" ); document.write( "and
\n" ); document.write( " $\"u+=+7\"$
\n" ); document.write( "The number is 37 \n" ); document.write( "

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