Answer:
2, 4
Explanation:
In 2, (2,2) has the same number on both sides, same with (4,4) and (6,6).
Therefore, it is equivalent.
In 4, dividing the first number by the second always results in 4. (4/1=4, 8/2=4, 12/3=4).
Therefore, it works.
The pattern used in 4 is how ratios work. Multiplying/dividing to get one consistent number.