perplexus.info :: Numbers : A number well defined

A number well defined (Posted on 2018-10-25)

Half of my 2-digit number N is also a 2-digit number,
one of its digit being the sum of N's digit, the other their difference.
All 4 digits are different.

Find my number.

See The Solution Submitted by Ady TZIDON

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Subject	Author	Date
re(2): Too much information	Steve Herman	2018-10-27 15:46:16
re: Too much information	Ady TZIDON	2018-10-27 11:34:42
Too much information	Steve Herman	2018-10-25 09:45:15
Algebraic Solution	Steve Herman	2018-10-25 09:33:06
Analytical Solution (D2?)	Steve Herman	2018-10-25 08:34:16

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