GivenGiven a two digit number #ab# with the digit sum #a+b=7#, and the difference of #ab# and #ba# equal to nine, find a and b? a digit number #ab# with the digit sum of 7 and the differ
1 Answer
Jun 26, 2017
The answer is
Explanation:
A number with 2 digits
Therefore,
But we have, also
Therefore,
and