Cryptography, Encryption, Cybersecurity.
away 7. Add 5, and half it. The answer is 9. Of course, this is a trick, and where we get: [(2(x+10)-7+5)/2]-x =[(2x+20–7+5)]-x = [(2x+18)/2 ]-x= [x+9]-x = 9 For this, we are basically just reversing back the method we quote in the track. And so, for encryption, we could multiply by 9, and add 14