Dolores claims that the best way to understand that , for all integers a and b, is to sh...

Dolores claims that the best way to understand that , for all integers a and b, is to show that when you add b to each expression you get equal answers.

a. Explain why you think Dolores is making this claim.

b. Do you agree with Dolores that her approach is the "best way"? If not, what is a better approach?