Predict: I predict this is going to be about algebra.

Question: The letters A, B, and C stand for different digits from 1 to 9. If A B C What digit does each letter represent?

ABC

BCA

+CAB

A=1

B=2

C=4

Big Question: What do the letters equal?

Solve: C being 4, B being 2, A being 1 and add that and its seven.

C+A+B= 7 so put seven down. B+C+A=7 so put seven down. A+B+C=7 put seven down.

Answer: 777