Mad Ade's Letter MathIn Cryptography teasers, a phrase or expressions has been encoded in some way (frequently by replacing letters with other letters). You need to figure out the encoding method and then decode the message to find the answer.
Substitute digits (0-9) for the letters to make the following addition true.
MAINTAIN + INTERNET = FIREWALL Replace the letters with the appropriate number to make the addition work. Keep in mind that neither the first or last number of each word is a 0 (zero) and if x=4 then all x's are 4 and so on. What Next?
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We do those at school, so it was quite simple 
Great job with it, i'm off to see the other 4 
