
A + B = C can be 1 + 2 = 3. A + B = C can't be 1 + 1 = 2. The same letters must be the same numbers. Different letters must be different numbers.
A + B = C can be 1 + 2 = 3. A + B = C can't be 1 + 1 = 2. The same letters must be the same numbers. Different letters must be different numbers.