This an example from my text book and it gives the answer as 17,19,27,29,39 and 49 but it doesn't give steps to solve. On other questions I have been able to determine the equation but I can't seem to solve with 2 variables.
Find all positive two digit odd numbers with this property: When the digits are interchanged, the result exceeds the original number by more than 36.
This is not solved by means of an equation, but rather by logical study/classification of all the possible pairs of digits
Let us write a two-digit number as "ab", so that the one with digits interchanged is "ba"
It is required that ba - ab > 36
Obviously a > 0 as ab must be an honest two-digit, and b > a.
For definiteness, let us name cd = ba - ab, where c and d are digits as ...