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.
I need the equation to be able to help
Answer: 
Step-by-step explanation:
To solve this exercise you need to remember the following:
→ 
Therefore, keeping the above on mind, you can solve for x as following:


Remember that, by definition:
, then you have:

Subtract 6 from both sides of the equation.
Then the value of x is:
