What operations have inverse relationship

The operation that reverses the effect of another operation. 

Example:
Addition & Subtraction are Inverse Operations.

Start with 7, then add 3 we get 10, now subtract 3, and we get back to 7.

Another:
Example: Multiplication & Division are inverse operations. 

Start with 6, multiply by 2, we get 12, now divide by 2, and we get back to 6.

Hope this helps

A= b/2 because u simplying both sides of equation