Decipher the following text
I know that C->A and B->T
The Attempt at a Solution
that means my two equations are:
2a+b=0 (mod 26)
a+b=19 (mod 26)
I must be solving these wrong. I need to get a decipher equation and I keep getting
d(k)=15(y-5) (mod 26) but that doesnt allow K->O like it should.