Answer: The answer is y = 9.
Step-by-step explanation: Begin with the equation: 3y - 7 = 20.
Add 7 to both sides to move the constant term to the other side: 3y - 7 + 7 = 20 + 7.
This simplifies to: 3y = 27.
Now, divide both sides by 3 to solve for y: 3y/3 = 27/3.
Simplify further: y = 9.
Hope this helps!