In the addition problem at the bottom, the sum of the two digits represented by B and C is ?. Each time the same letter appears it represents the same digit) 2BA

+C6D____
8AD

2 answers

2BA
C6D
-----
8AD

since A+D=D, A=0
so, B+6=10, and B=4
so, 2+C+1=8, so C=5

B+C=9
I just understand.........
Don't clearly...