Solving the equation 6x + 2(x − 1) = 30

Question

Given: 6x + 2(x − 1) = 30
Step 1: 6x + 2x − 2 = 30
Step 2: 8x − 2 = 30
Step 3: 8x − 2 + 2 = 30 + 2
Step 4: 8x/8
= 32/8

Step 5: x = 4

Identify the property that justifies Step 3 when solving the given equation.

Answer 1

The property that justifies Step 3 when solving the given equation is the additive property of equality.