No actually you can just multiply both sides of the equation by 2 and get y-4=20. then add 4 to both sides to get y=24.
answer: infinitely many :)
Answer:
Option (2) is correct.

Step-by-step explanation:
Given expression 
We have to find an equivalence value to the expression.
<u> Radical rule</u>,
Also,
Consider the given expression,

Applying radical rule to

Thus, the expression becomes,

Thus, option (2) is correct.