Question

Are the two equations b=A/3 and A=3b equivalent ? How do you know ?

Answer 1

Yes it is

Explanation:

Because, If you multiply by 3 on both sides for the first equation, you will get 3b = a

Answer 2

Yes because if you want Aa in first equation multiply both side by 3
b*3=(a/3)*3
A=3b
It’s equivalent with the second equation