Final answer:
The property justifying Step 3 in the equation is the Addition Property of Equality, which maintains the balance of the equation when the same number is added to both sides.
Step-by-step explanation:
The property that justifies Step 3 when solving the equation 8x - 2 + 2 = 30 + 2 is the Addition Property of Equality. This property states that if you add the same number to both sides of an equation, the equation remains balanced. In this case, adding 2 to both sides of the equation 8x - 2 = 30 ensures that the equality holds true.
Steps to Justify Step 3:
- Identify the equation: 8x - 2 = 30.
- Add 2 to both sides: 8x - 2 + 2 = 30 + 2.
- The equation now reads: 8x = 32, which maintains the balance and allows us to solve for x.