Respuesta :

Answer:

Answer would be c

Step-by-step explanation:

12+12=24   12-12=0

Answer:

C) 12

Step-by-step explanation:

A + B = 24 + A - B

Rearrange to get the integer on it's own:

A - A + B + B = 24

2B = 24

Solve for B

B = 12

If B = 12, A = 12

The sum = 24

And the difference = 0