Question 994546
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In the first place, I think you meant to say that the <i>sum of the digits of a two-digit number is 13</i>.  Otherwise I would have to ask you "the sum of a two-digit number and what?" since addition is a binary operation.


Be that as it may, you don't need a system of equations to solve this problem.  You only need one equation, namely:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 6x\ =\ 456]


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \